REST API: Add ability to paginate and order taxonomies.

Defaults to returning 100 items, with a max of 1000 per call.

http://[private link]

props @mdawaffe

Merges r104028-wpcom.
Merge branch 'master' of https://github.com/Automattic/jetpack
Remove force_url_to_non_ssl function.

In favour of core `set_url_scheme`.
Revert "Remove force_url_to_non_ssl function."

This reverts commit 0678457004cf20113a1f385cd8d840d5545e9011.
Switch from manual notifications to grunt-notify
Merge branch 'master' of sandbox:~/jetpack
Merge branch 'master' of https://github.com/Automattic/jetpack