Added debug infomation section into .mrb file
Add travis_config.rb
Fix .travis.yml
Remove empty line
Use mrb_check_datatype directly to avoid warning.
implement mrb_format and mrb_vformat
use new mrb_format API from mrb_raisef; its only format specifier is "%S" (stringify) and takes mrb_value; close #1062
Merge pull request #1086 from carsonmcdonald/randtypecheckfix

Use mrb_check_datatype directly to avoid warning.
Merge pull request #1085 from mattn/travis_config

Add travis_config.rb
replace non formatting printf to (f)puts
Merge pull request #1082 from masuidrive/add_debug_info

Added debug infomation section into .mrb file