Pluggable Math
Rake respects verbose flag also for test and clean target
Merge pull request #910 from mattn/pluggable_math

Pluggable Math
Merge pull request #905 from iij/pr-percent-notation

Regexp: %r notation bug fix.
Merge pull request #911 from bovi/verbose

Rake respects verbose flag also for test and clean target
Merge pull request #909 from mattn/cleanup_regexp

Cleanup Regexp codes
Merge pull request #906 from xxuejie/remove_unused_var

Do not generate test_args_hash variable if it is not used
Merge pull request #907 from masuidrive/mgem2mrbgem

s/mgem/mrbgem/
mv mrgems/mruby-math to mrbgems
Fix arena size check.
Move Math::TOLERANCE to mruby-math
Modification of CONTRIBUTING.md

Some minor fixes of the  CONTRIBUTING.md file.
Fix styleguide based on @cremno's input
Merge pull request #915 from bovi/patch-1

Modification of CONTRIBUTING.md
Merge pull request #914 from bovi/math_tol

Move Math::TOLERANCE to mruby-math
Adjust space
Merge pull request #917 from matsumoto-r/adjust_space

Adjust space
Merge pull request #913 from carsonmcdonald/arena_check_fix

Fix arena size check.
Remove unused structures.
Move the place of a curly bracket. This is just a cosmetic change.