Auto complete feature/release/hotfix branches in git flow.
Update readme to assume devs are on 64-bit Windows
Removing code to add a single ssh key if none are provided.

ssh-add, if run without parameters, will add all the keys found in ~/.ssh. There
is no need to use a default file when calling it.
Avoid polluting $error on module load

Closes #116
Merge remote-tracking branch 'upstream/master'