Cleanup: Several cosmetic changes
Fabric: Added support for deploying from a branch
Fabric: Add SECRET_KEY in Fabric sample settings
Fabric: Create directories for translations/repos during bootstrap
Fabric: Add syncdb and initdb new commands
Fabric: Add command for creating the DB
Fabric: Add commands for populating and dumping the DB
Fabric: Add sample settings.conf for providing Pootle settings
Fabric: Changes in sample virtualhost.conf
Docs: Add docs about Fabric deployment method

[ci skip]
Cleanup: put most likely to change options first in fabric.py.sample