Attempt to update documentation to clarify installation and requirements...

.... Rake wasn't mentioned in the ReadMe, and I had to find out about it in the posted issues (Hoe-ified the Project). Rake seemed to be required because the original install instructions produced gem not found. Installing dependencies may be easier through rake, but requires that I do more research. I feel this is an improvement for the time being. It also may be worth editing the ReadMe.txt and ReadMe.md to be more consistent stylistically.