Add ability to pass parameters from mrbgem.rake spec into test scripts.
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.
Remove ";" suffix from function-type macros.
Merge pull request #810 from masamitsu-murase/remove_semicolon_from_function_type_macro

Remove ";" suffix from function-type macros.
Add androideabi toolchain rake task (Build mruby with Android NDK)
Generate mrbtest.a file for sparete from driver.o
Fixed failure
Modify handling of integer literal.

Do not assume that significand of `double` is larger than `mrb_int`.