Changes default EC*Key.toString behaviour to Hex
Renames variables to better reflect their values
Changes expected key output to hex
Merge pull request #81 from Dcousens/tostring

EC*Key.toString now returns hex instead of WIF
tabs -> spaces
Removes unused variables
Various stylistic changes
Fixes variable redeclarations
Uses Array.prototype.foreach for stricter scoping
Strict comparison operators with 0