jf/rbenv-gemset — pull request #54 by felix125 (2013-11-26 16:38:57+00:00)
Title: Fix: append default GEM_PATH

Although only two gems in jruby(rake and jruby-launcher), jruby suffer the same problem.
I have tested it in jruby-1.7.6 and jruby-1.7.8

I think the better way for this issue is adding the default gem path back.