chore(doc-gen): add a jquery deploy environment, and give examples one index per environment

Adds a jQuery environment, and adds a processor to the docs.angularjs.org package
which runs after example index files have been generated. This processor copies
the index file once for each deployment environment, adding custom shared scripts
described in that env.

This does not yet handle changing the target of the iframe, so those all point
to the default no matter the version of docs being accessed.
chore(docs.config.js): fix path to cdn angular.min.js
chore(docs/config): use refactored dgeni examples package
chore(doc-gen): remove add-deployments processor and fix up config