Doco

Change-Id: Ib9b45e1cfcd57f5793efebb84d457c46535c43d8
Merge branch 'master' of https://kennardconsulting@github.com/metawidget/metawidget.git
Improved error messages

Change-Id: Ic5bd4cdeb84de75d4093c1aa42aa8a6f86b2e1ee