Added in some more model files for data storage.

Most of the files added are about getting data into Google's NDB and
persisting it. These models will likely evolve quite a bit over time,
including adding in property methods for non-stored values, but this
will provide a baseline for debugging and forward development.
Continued to expand on the data storage models.

Added in the basic units of skills, which will be a list of reference
properties inside the character rather than a whole bunch of extra data
points floating off disconnected except with KeyProperties.
Damn you case sensitivity.
Added in the skills and some more fameworking.

Added in the skill sub-models, as well as the beginnings of the property
methods used to return the computed attributes and bonuses.
Continued revisions on the character model.
Merge pull request #7 from Agerjag/chris/account_data

Character Data