Documentation Overhaul for Vundle

I've been doing a large update for the Docs, I think I'd like some feedback before merging. It is mostly done.
A few highlights:
* Clarified the example vimrc with further comments.
* Added intro section to quickstart to highlight Windows and FAQ links immediately. 
* Merged Why Vundle section to the About, seems appropriate.
* Quite a few syntax/grammar changes to improve readability.

You can see it visually at: https://github.com/starcraftman/vundle/tree/readme_changes

I've also been modifying the Wiki a bit. I don't see how to diff via GitHub so I'll just link the pages on my fork with notes. I'll probably just append a manual text diff in the comments to be clear.

[FAQ](https://github.com/starcraftman/vundle/wiki)
* Made an index with links to jump right to answer. Improves ability to find questions. 
* Cleaned up style, removed A: from the FAQ since that seems implied.
* Added a Windows EOL question, may revisit that later.

[Vundle For Windows](https://github.com/starcraftman/vundle/wiki/Vundle-Windows-Setup)
* Added explanation of .vimrc -> _vimrc.
* Explicitly detailed changes required to the example config to work.

I may further update the Windows wiki page but I'll do that in a separate update when I've a bit more time. That's it, comments?