Basic support for Haxe string interpolation completion
Provide regular completion inside of expressions in strings, handle ${} closing braces
Compatibility with nested expression blocks (ie. '${'${expr}'}')
Fix too early exit in dot completion + closing braces insert for '
Some more fixes for closing braces in interpolation expressions
Abstract string interpolation as a Context Feature
Fix escaped quotation marks in GetStringType() and remove the direction option
Clean up IsInterpolationExpr()
ASComplete: remove haxe_specific_completion region
Some more fixes
Merge pull request #354 from Gama11/HaxeInterpolationCompletion

Add Haxe string interpolation completion, closes #173