VE-548 adding source mode dialog
VE-548 adding the textarea and apply button to the source mode dialog
VE-548 styling textarea for source mode dialog
VE-548 getting and inserting wikitext into source mode textarea
VE-548 round trip mostly complete - get wikitext, edit wikitext, parse wikitext
working on inserting updated html into surface
Merge branch 've-sprint-6' into VE-548-source-mode-dialog
setting up the transaction for inserting wikitext back into the surface
fixing comment
Merge branch 've-sprint-6' into VE-548-source-mode-dialog

Conflicts:
	extensions/VisualEditor/wikia/VisualEditor.i18n.php
	extensions/VisualEditor/wikia/VisualEditor.php
	extensions/VisualEditor/wikia/VisualEditor.scss
Merge branch 've-sprint-6' into VE-548-source-mode-dialog
VE-548 fixing metadata reference
VE-548 fixing metadata reference
Roundtripping for "Source mode" dialog using temporary "wikiaparse" API method
getting closer to handling metadata correctly but there's still a lot to do
VE-548 adding loading graphic and clearing textarea on close
VE-548 creating WikiaDialog and moving loading logic to that level
Working prototype of source editing
Revert change to extensions/VisualEditor/modules/ve/dm/ve.dm.Transaction.js
Build transaction manualy in ve.ui.WikiaSourceModeDialog.js and merge store and internal list.