Correct conf.gem directory
Remove unused define and commented out code.
Add ability to pass parameters from mrbgem.rake spec into test scripts.
Merge pull request #800 from mattn/remove_quote

Remove double quote for MRUBY_XXX in libmruby.flags.mak
Merge pull request #801 from monaka/pr-cleanup-error_c-20130130

Remove unused define and commented out code.
Merge pull request #799 from carsonmcdonald/fixdoctoexample

Correct conf.gem directory
Make sure quotes and escapes get escaped.
Changed variable $test_args to constant TEST_ARGS
Protect irep of ensure.
Merge pull request #802 from carsonmcdonald/mrbgemstestpassargs

Add ability to pass parameters from mrbgem.rake spec into test scripts.
Merge pull request #803 from masamitsu-murase/protect_irep_of_ensure

Protect proc of ensure.
Add field_write_barrier when an method is defined.
Bug fix.
removed unused mrb_funcargv_t
removed unused mrb_check_funcall
Merge pull request #806 from cremno/unused-stuff

Unused func prototype and typedef
Merge pull request #805 from masamitsu-murase/add_field_write_barrier_to_guard_method_from_gc

Add field_write_barrier when an method is defined.
Change the way that the DISABLE_GEMS flag is set for vs2012.
Merge pull request #809 from mattn/vs2012_disablegems

Change the way that the DISABLE_GEMS flag is set for vs2012.
Merge branch 'master' into catch_initerror