Adding syntax highlighting option

To General Options Control
Renaming: XML to Xml

Inconsistencies all over the solution
Fix inconsistencies
Adding documentation skeleton
Moved syntaxcoloring.fsx
Add documentation entry to index.html
Really move it
Fix last inconsistency
Documentation & UI updates
Adjust F# types color & add illustration
Adding dark theme illustration
Some cleaning
Cleaning again
Cleaning v2
Syntax coloring should be on by default

Fix #202
improve symbol visual range recognition
rename several symbols

add an ignored SourceCodeClassifier test for Async type
Updated to FsXaml 0.9.3

Fixes Issue #190