UntaggedPlugin v.1.0.0 — added hideTagsReadOnly and link to untagged

Define tags to be hidden in readOnly mode using...
— config.macros.untagged.hideTagsReadOnly

Display a link to an 'untagged' tiddler defined via...
— config.macros.untagged.untaggedTiddler
Define as empty string to hide it.

Now allows to define noTagsWhenTagged and noTaggingWhenTagged as a
bracketedList of nultiple tagnames.