move summary of mrbgems in default gembox to its spec

mrbgems/default.gembox

 MRuby::GemBox.new do |conf|
-  # Use standard Kernel#sprintf method
-  conf.gem :core => "mruby-sprintf"
+  # see summary property of each mrbgem for detail
 
-  # Use standard print/puts/p
+  conf.gem :core => "mruby-sprintf"
   conf.gem :core => "mruby-print"
-
-  # Use standard Math module
   conf.gem :core => "mruby-math"
-
-  # Use standard Time class
   conf.gem :core => "mruby-time"
-
-  # Use standard Struct class
   conf.gem :core => "mruby-struct"
-
-  # Use extensional Enumerable module
   conf.gem :core => "mruby-enum-ext"
-
-  # Use extensional String class
   conf.gem :core => "mruby-string-ext"
-
-  # Use extensional Numeric class
   conf.gem :core => "mruby-numeric-ext"
-
-  # Use extensional Array class
   conf.gem :core => "mruby-array-ext"
-
-  # Use extensional Hash class
   conf.gem :core => "mruby-hash-ext"
-
-  # Use extensional Range class
   conf.gem :core => "mruby-range-ext"
-
-  # Use extensional Proc class
   conf.gem :core => "mruby-proc-ext"
-
-  # Use extensional Symbol class
   conf.gem :core => "mruby-symbol-ext"
-
-  # Use Random class
   conf.gem :core => "mruby-random"
-
-  # Use extensional Object class
   conf.gem :core => "mruby-object-ext"
-
-  # Use ObjectSpace class
   conf.gem :core => "mruby-objectspace"
-
-  # Use Fiber class
   conf.gem :core => "mruby-fiber"
-
-  # Use Enumerator class (require mruby-fiber)
   conf.gem :core => "mruby-enumerator"
-
-  # Use extended toplevel object (main) methods
   conf.gem :core => "mruby-toplevel-ext"
-
-  # Generate mirb command
   conf.gem :core => "mruby-bin-mirb"
-
-  # Generate mruby command
   conf.gem :core => "mruby-bin-mruby"
 end

mrbgems/mruby-array-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-array-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Array class'
 end

mrbgems/mruby-bin-mirb/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-bin-mirb') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'mirb command'
 
   spec.linker.libraries << 'readline' if spec.cc.defines.include? "ENABLE_READLINE"
 

mrbgems/mruby-bin-mruby/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-bin-mruby') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'mruby command'
   spec.bins = %w(mruby)
 end

mrbgems/mruby-enum-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-enum-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Enumerable module'
 end

mrbgems/mruby-enumerator/mrbgem.rake

@@ -2,4 +2,5 @@ MRuby::Gem::Specification.new('mruby-enumerator') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
   spec.add_dependency('mruby-fiber')
+  spec.summary = 'Enumerator class'
 end

mrbgems/mruby-fiber/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-fiber') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'Fiber class'
 end

mrbgems/mruby-hash-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-hash-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Hash class'
 end

mrbgems/mruby-math/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-math') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'standard Math module'
 end

mrbgems/mruby-numeric-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-numeric-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Numeric class'
 end

mrbgems/mruby-object-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-object-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Object class'
 end

mrbgems/mruby-objectspace/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-objectspace') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'ObjectSpace class'
 end

mrbgems/mruby-print/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-print') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'standard print/puts/p'
 end

mrbgems/mruby-proc-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-proc-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Proc class'
 end

mrbgems/mruby-random/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-random') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'Random class'
 end

mrbgems/mruby-range-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-range-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Range class'
 end

mrbgems/mruby-sprintf/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-sprintf') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'standard Kernel#sprintf method'
 end

mrbgems/mruby-string-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-string-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional String class'
 end

mrbgems/mruby-struct/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-struct') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'standard Struct class'
 end

mrbgems/mruby-symbol-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-symbol-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extensional Symbol class'
 end

mrbgems/mruby-time/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-time') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'standard Time class'
 end

mrbgems/mruby-toplevel-ext/mrbgem.rake

 MRuby::Gem::Specification.new('mruby-toplevel-ext') do |spec|
   spec.license = 'MIT'
   spec.author  = 'mruby developers'
+  spec.summary = 'extended toplevel object (main) methods'
 end