The mod time of a target directory can't be reliably checked using the files, so we need to compare
the modificaiton times of each source and destination image file as we go.
By default, it still does the same thing, but now you
can pass in a fancier packer.
Provided a SLIGHTLY fancier one that's still pretty dumb and
wasteful, but allows row wrapping instead of gluing everything
together into one super wide image; I've got some that otherwise
wind up SO insanely wide that it causes problems decoding them.
Introduced a Writer class to hold all the options to the createBundle method and help clarify
things. This also ended up being a convenient place to put the previous member variables since
they affect the process in pretty much the same way.
Got rid of DirectoryTileSetBundler. This had a mutated copy of a method from TileSetBundler,
that appeared to be missing some bug fixes. Anyway, it shouldn't be needed anymore, callers
can use a BundleWriter that is a directory.
Added an option for outputting tileset bundle metadata as json. This includes some
utility classes and the net.sf.json-lib dependency. This follows the same pattern
as some other tools only jars so should end up being ignored by production
applications.
Michael Bayne