Moved OME-XML classes to OME-Formats

Having both converted OME-XML SCIFIO classes and the Bio-Formats
compatibility format was conflating the purpose of this project.

The classes in SCIFIO-BF-compat provide legacy Bio-Formats functionality
via a wrapper SCIFIO Format.

The converted OME-XML SCIFIO Formats (non-delegators) were thus moved to
a new project: OME-Formats. This will also contain converted Bio-Formats
formats.

SCIFIO-BF-compat now has a dependency on OME-Formats for convenience (so
a single dependency gives both legacy format coverage and SCIFIO OME-XML
support).