Rename TinyMCE plugin scripts
Remove current editor from Gistpens
Quick doc fixes
Re-add editor, manipulate current editor into ACE

We likely need to implement some way of switching between ACE and plaintext. Currently implementation doesn't work because it wipes away the standard text editor where WordPress gets the content
Improved editor switching

Unfortunately, no text syncing yet.
Text syncing and post updating works
More ACE editor improvements

* Add ace theme selection box and save selection properly
* Copy ace file location and enqueue properly
Merge branch 'feature/ace-editor' into develop

* feature/ace-editor:
  More ACE editor improvements
  Text syncing and post updating works
  Improved editor switching
  Re-add editor, manipulate current editor into ACE
  Quick doc fixes
  Remove current editor from Gistpens
  Rename TinyMCE plugin scripts
Fix README and update CHANGELOG
Change Ace references to self in closures
Cleanup

* Remove extra property for meta box and only show theme selection field on Gistpens
Not nix, shell
Whitespace cleanup
Scaffold tests via WP-CLI
Switch Ace theme selection from CMB to bespoke
Register Gistfile post_type
Split editor class into post + gistpen
Massive edit page overhaul

* Replace editor with rendered editor
* Remove excess DOM manipulation
* Remove extra AJAX calls
* Save new Gistpens to Gistfile, attached via postmeta
* Clean up editor look
Add repeatable editor

* Split JS into two files
  * Over Gistpen editor obj
  * Indiv Gistfile editor obj
* Properly render initial Gistfile editor
* Wire up button to add and delete Gistfile editors
* Correctly attach all Gistfile to Gistpen
Merge branch 'feature/has-many-files' into develop

* feature/has-many-files:
  Add repeatable editor
  Massive edit page overhaul
  Split editor class into post + gistpen
  Register Gistfile post_type
  Switch Ace theme selection from CMB to bespoke
  Whitespace cleanup
  Not nix, shell
  Cleanup
  Change Ace references to self in closures