Move Integer.{floor,ceil,round,truncate} to mrblib/. For maintainability.
Remove unused functions.
Integer.round have no arg.
Merge branch 'master' of github.com:mruby/mruby
Fix to fit new raisef format.
Fix typos.
Use mrb_raise() as possible instead of mrb_raisef().
Add fib39.rb to benchmark/
mrb_any_to_s: add separator
revert 79ebdb5 for the time being #1110
Merge pull request #1123 from monaka/pr-add-fib39-to-benchmark

Add fib39.rb to benchmark/
Merge pull request #1122 from monaka/pr-cleanup-raise

Cleanup around mrb_raise calls
bugfix: Kernel#!=, and add #!= testcase.
Merge pull request #1124 from kouki-o-iij/pr-kernel-notequal

bugfix: Kernel#!=, and add #!= testcase.