V4

Theory in #106

* [x] Gist save/load cycle #147 
* [x] GitHub save/load cycle #148
* [x] Indicated saved/unsaved state #149
* [x] Functional import panel as a source #150
* [x] Grab raw data #139
* [x] Save/Open/Import Terminology and Interface #151
* [x] Formalize URL structure #152
* [x] Re-emerge sharing options #153
* [x] Design Chrome Extension Shoutout #154