Add setup instructions; Logging and more

- Add a .gitignore file
- Change the Vagrantfile network settings, so the work on
  vagrant 1.4.3
- install.sh now logs to install.log (and makes backups of older
  log files)
- Started on instuctions in README.md on how to set up Act
Merge pull request #3 from sjn/master

Add setup instructions; Logging and more