Add support for namespaces when doing text extractions.
Add support for namespaces when doing text extractions.

The namespace separator can be specified in the task options (defaults to '.')

If an extracted message has a prepended namespace it is used as the key in the final translations map. If there's no key detected then 'messages' is used as a default key.

Each key in the translations map represents a namespace and is output as a single file containing the message Ids etc.

The same namespace can be used in multiple source files and the usages will be merged in to a single output file per namespace.

onshape/grunt-xgettext,onshape/grunt-xgettext