Fixed tooltip provider base class.
The LanguageItemTooltipProvider get's removed in future versions.
Remove the FSharpSyntaxMode.xml file - it's now part of MD 4.0.
The syntax files will change much in 4.0.2 - all colors got renamed &
work a bit differently.
Disable the unused semantic highlighting.
* This implementation re-reads the xml file on every load
* Semantic highlightings are better applied using a text editor
extension - it can take care of parse information updating
Removed syntax mode from the addin definiton.
Merge pull request #113 from mkrueger/monodevelop

Fixed tooltip provider base class.