* Get emmet completions from html,css extensions
* Resolve extensionsPath, use emmet results even if empty
* Support css abbr with :
* Refactoring
* Add some basic emmet tests
* Refactoring
* More tests
Moves the html extension's client code to strict mode and also updates some of the server code. The rest of this migration will requires changes to the *.d.ts files that the server consumes