Remove the "optional slot names" argument for the object enumerator.

NWTImageBrowserViewController: Ensure that the 'bits slot isn't
nil before adding to our list of images.
Support looking for 'colordata, if we're unable to find 'bits.
Attempt to use the 1-bit depth colordata for now.
Look for frames with colordata+bounds in addition to bits+bounds.
Bail if there is a non-0 (kSampleStandard) compression type set.
Updating comments on sound frame values.
Ignore cbits blobs.
Handle nil filenames, properly handle unique'ing names when
saving a batch.
Updated NEWT0 with support for parsing RExBlock packages.
Stash the list of RExBlock packages as an ivar.  During import
if we have packages, make the rom variable a frame containing
a slot 'romSoup -- for the existing array we've been populating,
and a slot 'packages, where we can import the RExBlock packages.

The package loading is still commented out due to one package
in my eMate image driving NEWT/0 package loader insane.