do not need quotes in math expressions when calculating array size, fix #2057
improve the warning for bundler binstubs hook, closes #2055
Add ruby-2 utf-8 badge
Merge pull request #2070 from elia/patch-1

Add ruby-2 utf-8 badge
update tests - add .ruby-version test, closes #2064
Merge branch 'master' of github.com:wayneeseguin/rvm
issue proper error / warning when compiler missing, update #2071
Merge branch 'master' into features/osx_ruby_static