Sign the contributor agreement.
Preparing for 5.0.13
New ribbon colour for 5.0.13
 Docs update
Fix importing blank fields from TiddlyWiki files
Fixed missing class on external pretty links
Fix obsolete transclude widget docs
Merge pull request #617 from IreneKnapp/Irene-contributor

Sign the contributor agreement.
Add keyboard shortcut documentation
Fix for inability to scroll modal wizards
Add support for $:/tags/RawMarkup
Fixed default tiddler not appearing in zoomin view

See https://groups.google.com/d/topic/tiddlywiki/c-z7f-h1CAo/discussion
Retract inadvertant change from previous commit
Workaround Firefox "no element found" bug

See https://bugzilla.mozilla.org/show_bug.cgi?id=884693

Fixes #468
Restore "escape" as shortcut to abandon edits

Thus reverting a defensive change back in January:
d72d245523d9dbe235c3158976335e8a41aaa359
Fix vertical tabs in Safari

Current versions of Safari on OS X and iOS are still prefixed.