jbundler support
get the jbundler specs working
added some notes on jbundler
Merge branch 'jbundler' of github.com:jruby/warbler into jbundler

Conflicts:
	lib/warbler/traits/jbundler.rb
find the classpath via the Jbundler::Config and just assume it is already created
made the maven local repo part of the sample_jbundler
Invoke jrubyc using system to ensure that STDERR from jrubyc is shown. Raise exception if jrubyc results in an error.
Run jrubyc command in empty environment to ensure it runs (can fail due to Bundler values etc)
Adding WEB-INF to  for simple Rack-only apps
since travis does not like unshallow anymore
Revert "since travis does not like unshallow anymore" - did not work as hoped

This reverts commit 4c77a8e92fd906984f6d4699c3615687c14af828.
try work around for travis git version issue
get the specs pass for jruby as well for MRI
Merge pull request #225 from mkristian/jbundler

get the specs pass for jruby as well for MRI
Specs and a possible fix for gemfile git entries

See issue jruby/warbler#165.
Fix spec for jruby: don't use `:err` for `IO.popen`