be less strict about the jruby.home warning
use a working default when jruby does not run inside the currentThread.contextClassLoader
asd
Merge branch 'master' of github.com:jruby/jruby
remove obsolete setting of jruby.home
more tests for jruby-complete and jruby artifacts

jruby-complete is tested via command line. the jruby-core+jruby-stdlib
artifacts are tested using the ScriptingContainer.

Sponsored by Lookout Inc.