Rearranging test data files
Fixing lexer and parser tests post rearrange
Tests for code completion
Default code formatter for angular expressions

Fixing null references when editing
NgInclude reference provider uses angularjs lang

Previous version was parsing the contents of HTML attributes, it's now
looking for angularjs string literals. Doesn't display code completion
yet, I think because (Angular)JS doesn't have a code completion items
provider based on references. Yet.