fix unnecessary irep_free
Pass verbose flag to each gem test
Merge pull request #1203 from xxuejie/pass_verbose_to_gem

Pass verbose flag to each gem test
Merge pull request #1202 from masahino/fix_load.c

fix unnecessary irep_free on load.c
Fix segfault on loading binary RITE files.
Set ENV before loading Rakefile in minirake
Fix wrong comment
Merge pull request #1208 from tomykaira/fix_wrong_symbol_comment

Fix wrong comment
Merge pull request #1204 from monaka/pr-fix-segfault-on-loading-binary-mrb

Fix segfault on loading binary RITE files.
Merge pull request #1207 from h2so5/set-env-before-loading-rakefile

Set ENV before loading Rakefile in minirake
rename ARGS_GETXXX macros to avoid potential name conflict; close #1206
rename MRB_ARGS_XXX to MRB_ASPEC_XXX; ref #1206
put MRB_ prefix before ARGS_XXX macros; ref #1206
add new functions to check if symbols are interned without registration.
rename every ARGS_XXX to MRB_ARGS_XXX; ref #1206
modify the type of return value (mrb_bool => mrb_value).
modify functions to suppress symbol registration into intern pool.
add new macro MRB_ARGS_ARG(n1,n2) to specify required and optional arugments at once
remove too many paren; ref #1209
aspec bits should be packed in Ax; ref #1209