Add Angular Best Practices

A first crack at some Angular best practices arrived at through a seven month
angular project and discussions with other teams doing angular work around the
company. I'm no angular expert, but these are practices I can remember working
well, particularly in the face of other options that *did not* work equally
well.
If you're going to use jq* I feel like you might as well  use jquery proper. If you need something like jquery, the jqlite methods available are sufficiently limited so as to be a bother, and their documentation points to jquery docs (even though they are not equivalent).