Fix capitolization error in readme.
Made commit immutable.

These objects should not be changed after creation.
Removed puts.
Removed class methods and decreased scope where possible.
Added the concept of a developer.

This also adds the ability to find
existing developers.
Commits parse developers now.

Previously the name and email were stored in strings, now
they are stored in the developer object.
Added trophies to developer.

Now stats tracks the trophies on a per developer basis.
Merge pull request #3 from doyle/master

Various Changes