New build system

This should help to make releases easier. It does the following things:

 - remove version info from source files and replaces it with a placeholder
 - adds `make release version=x.y.z` that replaces said placeholder
 - tags the resulting release
 - from this tag, builds all the wrappers, minifies them and the original mustache release and tars it all up individually
 - creates a new folder and page in gh-pages and appends the new release to index.html
 - woot.

Addresses #171