Add bundler to befog gem dependencies

[lancelakey]

root@test9:/tmp# befog
/usr/local/rbenv/versions/1.9.3-rc1/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:in require': cannot load such file -- bundler/setup (LoadError) from /usr/local/rbenv/versions/1.9.3-rc1/lib/ruby/site_ruby/1.9.1/rubygems/custom_require.rb:36:inrequire'
from /usr/local/rbenv/versions/1.9.3-rc1/lib/ruby/gems/1.9.1/gems/befog-0.3.0/bin/befog:4:in <top (required)>' from /usr/local/rbenv/versions/1.9.3-rc1/bin/befog:23:inload'
from /usr/local/rbenv/versions/1.9.3-rc1/bin/befog:23:in `

'

After running "gem install bundler" befog will run as expected