Adding Gulp

The makefiles included in the project dont work on windows 8, using [GnuMake](http://gnuwin32.sourceforge.net/packages/make.htm)

Added in a simple gulp based system (though left make there) to:
- browserify with reactify transform
- compile less
- compile examples
- watch
- using [browserSync](http://browsersync.io) launch a local server

It should make it easier for people to contribute / use this on windows as it builds up and runs a local site with some examples

Havent looked at replacing the standalone or docs makefiles, but would be much appreciated by those of us not on *nix if this used gulp (or grunt)...
For the standalone part, the issue was with browserify_shim as it isnt compatible with browserify 5+ so would have to have a separate gulpfile under standalone (like you do for makes)

How would you feel about using webpack (with a pull request, of course)?

good point.
I tend to prefer avoiding implicit dependencies, but will move this into the examples folder so its only there we are explicitly assuming you get BS3 via npm (not bower, etc)