Updating FreeMarker syntax

Adding scope regex for comment and macro / function
Adding FreeMarker snippet

Adding FreeMarker message snippet
Adding JavaScript snippet

Adding snippet for a TODO comment
Adding JavaScript snippet

Adding a snippet for console.dir
Adding JavaScript snippet

Adding a snippet for console.log
Adding XML snippet

Adding a snippet for <description>
Adding Stylus syntax

Adding a new syntax for Stylus because the other one is unsatisfactory.