bitshifter is a simple webserver that listens for bitbucket repository push

webhooks and then if there is a clone of that repo locally, it pulls in the new

changes and then pushes them to a new repository.

This is done via the `incoming` and `outgoing` paths in the local hg repo.

Right now it is expected that the `incoming` path points to bitbucket and the

outgoing path goes where ever you want. However, to be able to push,

bitshifter *must* have permission to do so. This can be via ssh key, but if

the key has a password it must be unlocked and added to an ssh agent that

bitshifter can access.

bitshifter listens on `0.0.0.0:11101` by default. To add bitshifter as a

webhook on bitbucket, you must specify the url as

`http://ipaddress:11101/hooked`.

Repositories are expected to be in located in the `repos/` directory and

they should be the same path as they are on bitbucket. For example, this

repository is `rw_grim/bitshifter` on bitbucket, so it's path relative to this

file is `repos/rw_grim/bitshifter`. Once the repo is cloned into that

directory, you need to make sure that it has both an `incoming` and `outgoing`

path. Once that's done, you should be good to go.