Removed unessicary
Major refactor

* Moved code blocks into functions for better modularity
Separated download progress indicator from download method
Moved functions into a new Bandcamp class
Command line utility is now separate

requires docopt for command line argument parsing
Typo in doctype description
Removing unnessicary
Add: Download method now accepts a URL
Add: Script now downloads cover art

closes simonwjackson/bandcamp-dl#1
Change README file to reflect current command options.

	* README based on https://github.com/rg3/youtube-dl/blob/master/README.md

closes #4
closes #10
closes #9
closes #8
closes #7
closes #6