Documentation: Changed file/folder names to upper-case.
Fixes wet-boew's links to those pages and increases consistency with the repo's name.
fixed messages.min.css
Merge pull request #594 from shawnthompson/splash

fixed messages.min.css
Merge pull request #591 from EricDunsworth/docs-ref-dir-casing

Documentation: Changed file/folder names to upper-case.