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


http://issues.fluidproject.org/browse/FLUID-5485
This link to the ComponentGrades.md page needs to be in HTML