[Getting Started] Fixed Symfony docs Standards and more

This includes:

 - The XML format @dbu and I discussed earlier (see https://github.com/symfony-cmf/symfony-cmf-docs/pull/113/files#r3886994 )
 - Removing literals from bundle names. Literals should only be used for classes, paths, methods, code related things, ect. **not** for bundle names. (this is discussed with @dantleech on IRC)
 - Changing inline hyperlinks to target hyperlinks
 - Using `*` for list items (`-` is not officially supported by ReSt)