Updated documentation
Fix document template file

Fix document template file (obviously TM2 doesn't use them anymore ->
obsolete?)
First commit of graph visualization functionality

+ Export visualization
+ Visualize knowledge base
Updated snippets

+ Basic prefix block
+ Document skeleton
Add support for TM's editor UX improvements

+ Initial support for auto-complete (URIrefs of RDF/S)
+ Folding/Bracket matching
+ ?