add bash alias rewhile
update .gitignore
set foldmethod for go in .vimrc
bump git-greb

* lib/go/src/github.com/daniel-fanjul-alcuten/git-greb ab5f81c...8dd8057 (3):
  > Assert there are no incompatible flags
  > Add option to not pull at all
  > Add option to check out instead of pulling