Merge pull request #54 from ysb33r/master

FIxes #53
Upgrade the default JRuby version to 1.7.15
Update the bintray link to the right repo

Fixed a few other typoes too
Merge pull request #55 from rtyler/jruby-15-upgrade

Upgrade the default JRuby version to 1.7.15
Remove caveat about JRuby 1.7.14
Switch over to the jruby-gradle project's version of the warbler-bootstrap
Add 'provided' scope
Merge branch 'master' of https://github.com/jruby-gradle/jruby-gradle-plugin
Update import statement for new package name
Merge pull request #56 from bbradbury/master

Update import statement for new package name
Merge branch 'master' of https://github.com/jruby-gradle/jruby-gradle-plugin