Update reference to vim-slim
Merge pull request #22 from xdutreilh/master

Update information about slim-rails
Fix link to vim-slim
Use powerline (vim-powerline is deprecated)
Merge pull request #23 from xdutreilh/master

Replace vim-powerline by powerline
vimrc.before/after
Merge remote-tracking branch 'origin/master'
changelog and readme cleanup
resurrect old powerline plugin