Cleanup

1. Cleaned up `provision.sh` script, removed superfluous comments and vim configuration
1. Created `quick_install.sh` for single-command installation with default configuration options.
1. Updated `README.md` with full installation details

Tested both the original version and these changes on fresh Debian 7.6.0 VM installed in virtualbox. No obvious issues, everything installs cleanly.

Next steps:
* Configure & deploay a sample exitnode for testing
* Also configure a test node (2.4ghz wireless device)
* Perform tests to verify system functions, use for testing before deploying to live server.
* Configure such a system at sudo room for regular usage