Merge pull request #257 from HondaDai/refactor

remove cache folder after creating project
Merge pull request #258 from HondaDai/refactor

fix wrong message when installing project
update jruby to 1.7.14 for Java 8 performance issue

ref: https://github.com/jruby/jruby/issues/1858
add breakpoint support for susy
add breakpoint autoupgrade
Merge remote-tracking branch 'kkbox/master' into refactor
add sassy-maps autoupgrade
bootstrap-sass 3.2.0.1 -> 3.2.0.2
sass 3.4.1 -> 3.4.2