source/journalist documentation

separates source and journalist user manual, updated for 0.3. updated readme.md. also updated full_install.md up the point of running the ansible-playbook. still need to merge that doc with install.md but wanted to discuss before doing so
I was using a Tails persistent USB for this. Though this was my first time doing it, so I could've fucked something up. I can try again today and see if it happens again.