Added HowlerJS Definitions

https://github.com/goldfire/howler.js
Change highlight.js test for v8.x.x interface
Move default highlight definition to 7.5.0
Add definition for latest version of highlightjs
Add myself to CONTRIBUTORS
Add missing semicolon in test
Fix indention for highlightAuto parameters
Add missing semicolons in definition
Remove private RegExp vars
Change ICompiledMode keyword to Object
Change keywords in IMode to any

The keywords key can be represented by either a string or an object, see:

http://highlightjs.readthedocs.org/en/latest/language-guide.html#keywords
Add HLJSStatic for registerLanguage use
Change registerLanguage definition to a function
No longer require begin

This is so registerLanguage parameter can return the IModeBase type, with is
essentually the language definition.
'stampit' module definitions and tests.
Big update of Azure SDK for Node definitions
Add i18n-node definitions
Add jsonwebtoken node module definitions
Add definitions for passport-local module
Add definitions for sendgrid sdk for node