Pull Request #1: Fix for repository cloning

- fixes connection errors related to Rugged.
- bumps the rugged git-bindings to 0.21.

Closes #1
[1.2.2] Fetching/merging from repo as default.

This commit adds fetching the gitolite rpeo from origin/master
upon initialization.
By default, gitolite issues a git reset --hard beforehand.
Use the following setting keys to influence that behavior:
update_on_init, reset_before_update
Merge branch 'feat_fetch_merge' into devel