Updated decorators for widget (multi)adapters
Aligned to #28. Rewrote widget_for_{object|field} functions
Reviewed "widget-info" Paster subcommand to also present multiadapter widgets
Provided a basic multiadapter widget (tags on [IList, ITextLine]). Reviewed tests.
Merge branch '28-multiadapter' into 19-9-widgets
Reorganized INSPIRE vocabularies (separated module loading at service startup)