Cleanup /srv/APPNAME/shared/bundle/ directory.

Cleans up the /srv/APPNAME/shared/bundle/ directory after ruby:upgrade.
Fixes issue #100.
Merge pull request #158 from bryantraywick/cleanup-bundle-directory-when-upgrading-ruby

Cleanup /srv/APPNAME/shared/bundle/ directory.
Adds src193railsexpress as a ruby option.
Merge pull request #159 from railsmachine/kplawver-railsexpress-patchset

Adds src193railsexpress as a ruby option.