Closes #81 logging enhancements, Gruntfile enhancements, VS2013 support

* Closes #81 - added `debug`, `info`, `warn`, `error`, and `fatal` methods. All support variable arguments:
  - `logger.info(1, 2, "foo");`
* Added `LogSpec` tests for `Logger` and `ConsoleAppender`
* Add VS2013 solution for Typescript, sample game, and Jasmine support
  - Core engine
  - Tests
  - Samples (game and particle tester)
* Modify makefile
* Modify gruntfile
  - Add documentation
  - Add two ouputs instead of just one for Excalibur core compile  
* Fix small JS issue with Drawing