Improved user interaction

Allows the user to specify what script to run every five seconds. Now
gives usage information when not specifying a script.
Added useful information to README
Restructured repo for pip distribution

Added required files and built setup.py.  Also restructured the
README (pun intended).
Basic configuration file usage
Merge branch 'master' of https://github.com/h2g2guy/statuspi.py

Conflicts:
	bin/statuspi.py