[lib] Encapsulate in a self-executing anonymous function.
Merge pull request #1 from mwbrooks/modularize

Encapsulate in a self-executing anonymous function.
Attempting to preform my own SHA1 so I don't have to pull in a large crypto library. Added sha.js and sha1.spec.js. Removed jasimeJS example files.
leftRotate and rightRotate compeleted and tested. Create a gitignore file to handle those pesky swap files.
Added SHA1 message preprocessing and test. Current testing is solely on size.
DRY up the Entropy constructor.