This allows a global jruby to be set. Currently jrubyWar configuration uses tat, but it forms a basis for future configurations and tasks to also use it.
Merge branch 'master' of https://github.com/rtyler/jruby-gradle-plugin
Reverted an accidental doFirst that was added to jrubyCacheJars
Merge pull request #14 from ysb33r/master

Allowing user to set a default JRuby version