Actually generate source keys asynchronously
Remove now-unused background.py
Always generate keys async to avoid delaying response
Update source when keys are generated, resolves #789
Update HACKING.md to more closely resemble reality
Typo in HACKING.md
Add KeePassX password template as xml, remove template as binary blob,
update instructions for using the template. Resolves #798.
Merge pull request #799 from runasand/develop

Add KeePassX password template as xml, remove template as binary blob,
Cleaning up develop.md formatting, add more manage.py examples, removed reference to vagrant-cachier version
deleted HACKING.md, because it's outdated and new documentation is in doc/develop.md
Update deployment_practices.md
Merge pull request #796 from freedomofpress/source-key-generation

Improve source key generation
Merge pull request #797 from micahflee/vagrant-instructions

Updated HACKING.md to more closely resemble reality
Merge remote-tracking branch 'upstream/develop' into remove-hostmanger-plugin

Conflicts:
	docs/develop.md
removed refs to hostmanager and digital_ocean vagrant plugins