Binding flask server to 0.0.0.0
don't need to clone the repo script is contained in
only use color when using tty
do apt-get update before installing dependencies
Added Vagrantfile for running SD in a VM.
adding vagrant instructions to the HACKING.md file
fixed random generation for passwords etc. to fix sed escaping issue
changing config to match parameterized securedrop root location
added virtualenv into document-requirements dependencies.
Added usage and unaided install flag for vagrant.
Merge pull request #279 from rosatolen/vagrant

Conflicts:
	.gitignore

closes #279