Edit project structure and info

- update readme
- update .gitignore
- remove commented out lines
- rename webserver to web (it's always a server)
- move git tasks to web (don't need git on db-servers)
- split web tasks in smaller files
- rename ansible_on_box.sh
- install ansible from package source
- use ansible local vagrant plugin
Merge pull request #1 from jobridts/improvement/restructure

Edit project structure and info