More Docs Cleanup.

* Pulled ImageMorph into its own page. Needs fleshing out though, including examples.
* Pulled OleFileIO into it's own page, and included most of the OleFileIO-README file there as documentation. Converted the formatting from .md to .rst, removed versioning that doesn't apply to Pillow (since we've never had the older versions) and removed some bits that don't need to be highlighted in the docs. 
* Changed the format of the docstrings in `OleFileIO.py` so that they are picked up by the sphinx parser. I've tried to keep the changes to the line where it appears, not to reflow the strings so to make future merges easier.