remove not needed options from parallel in :bundle_gems
make sure rvm part of :bundle_gems is run with :rvm_shell
load rvm part of bundler only when rvm was loaded
do not load rvm variables without fallback as it fails even task is not executed
transform rvm:create_wrappers to parallel so it does not fail when there is no rvm at all
Merge pull request #40 from mpapis/master

fix rvm integration