Merge pull request #2 from KKBOX/master

jruby 1.7.12
add auto upgrade extension script
bootstrap-sass 3.1.1.0 -> 3.1.1.1, compass-h5bp 0.1.1 -> 0.1.2, compass-normalize 1.4.3 -> 1.5, susy 1.0.9 -> 2.1.2
Merge pull request #229 from HondaDai/auto-upgrade-ext

Auto upgrade extension script