Reformatting code, and changing some of the implementations.

Formatted the code with PEP8 in mind.  
Added Registry and enum34 prerequisites in order to avoid import errors.  
Changed the name of the program to 'registry_ripper.py' (could also be 'reg_rip_by_date.py') because CamelCaps program names aren't as pretty.  
Modified the arguments and some of the implementation methods, but kept the idea and functionality of the code completely intact.