Complete Rewrite

This is a rewrite to allow greater customization of each part of the compiled template(s).  I recommend reading the new README:
> https://github.com/ericclemmons/grunt-angular-templates/tree/0.4.0

This rewrite is mostly to allow extreme customization (based on comments & PRs) of:

- `$templateCache` ID via the `url` option
- AMD/CommonJS/etc. support by customizing the `bootstrap` option
- Modification of template source code (like automatically converting Jade to HTML) via the `source` option
- Adding to or making a module via the `standalone` option
- Support for `angular.noConflict()` via the `angular` option

Read up on the options here:
> https://github.com/ericclemmons/grunt-angular-templates/tree/0.4.0#options

To make things easier, I ditched a lot of the "grunt-style" README formatting and included Examples:
> https://github.com/ericclemmons/grunt-angular-templates/tree/0.4.0#examples

This PR should simplify usage and provide more flexibility without addings tons & tons of new options.

Let me know what you think, please!