FLUID-5485: Added UIO docs

Converted the following wiki pages to markdown:

http://wiki.fluidproject.org/display/docs/User+Interface+Options+API
http://wiki.fluidproject.org/display/docs/Tutorial+-+User+Interface+Options
FLUID-5485: Updated README

Added links to the new files in the readme
FLOE-5485: Correcting syntax issues.

Corrected syntax and styling issues as recommended by the code review comments.
FLUID-5485: Added placeholder pages

Added placeholder pages for references to unconverted documentation pages. Specifically TableOfContentsAPI.md and CookieSettingsStore.md
FLUID-5485: Updated placeholder links.
Merge remote-tracking branch 'justin/FLUID-5485'