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

Fix compiler warning by exiting if wfp isn't set

Fix for issue 1243

add comments for mruby-array-ext

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*