Changed the object_count so that it only iterates over the RBasic object, not the full RVALUE known by the GC

ObjectSpace.count_objects was incorrectly checking if an object was already freed. Amended the count_objects test to ensure the correct distinction

Change alghorithm to algorithm

Fix for 'inline' macro redefinition error in VS2012 C++

Rename parameter names for mrb_yield

consider gem version to be 0.0.0 unless specified

remove unused variables

Print mrb_value instead of RClass*

fix regexp warning: character class has duplicated range

[mrbgems] GEM Dependency Check

[doc] Add minimal build configuration

[TestEnv] Fallback print method

In relation to #1225.

Adds a minimal build configuration for libmruby which contains as less as possible.