Add node requirejs to build the project without Grunt (work in progress)

- Gruntfile is still broken.
- Node build works.
- At this point we can start rewriting the gruntfile and dependecies as pure
  dev dependencies.
- Need to impliment stripdefines in node.
- Need to move banners, requirejs config to config files that can be required.
- Need to re-impliment uglify, callback.
- Need to impliment temp directory (node-tmp) OR all buffers, all the time
  (preferable).
- Need to impliment output path.
Move banners into a node require file
Rename config-all.json to config-modernizr.json

In preperation for adding config-require.js.
Remove unused lib/processbuild.js

There are no references to processbuild.js in the current codebase. The last
references to it are moving the file in Feb 2013:
16ad49aa670fa1207f873beb0069c5575be77485

and linting the file:
ab90b7b2757dfeabe31473d18f92ce707dc88555
Add rjs configuration builder in lib
Standardize on ': ' over ' : ' in ModernizrPrototype.js
Move stripdefine and add class prefix into node
Use requirejs's uglify

`beautify: { ascii_only: true }` doesn't seem to be a valid requirejs
uglify setting. No change when added to the configuration.
Move all grunt packages into devDependencies