Add mruby-discount
Merge pull request #19 from matsumoto-r/add_mruby_discount

Add mruby-discount
Add mruby jpeg spec.
Merge pull request #20 from carsonmcdonald/addmrubyjpeg

Add mruby jpeg spec.
add mruby-onig-regexp.
Merge pull request #21 from mattn/mruby-onig-regexp

add mruby-onig-regexp.
Add Dir and Random GEM from IIJ
Add PCRE regexp GEM
Fix mruby-dir GEM