This removes the dependency of the Havok SDK or getting the decompiled
skeleton files from TexTools or some other place. Code courtesy of
FFXIVTools. The other two ways of reading skeletons (SKEL and Packfile)
are removed which gets rid of two dependencies.
Before this change, if you wanted to include physis you had to include
a bunch of dependencies you didn't need. For example, a launcher would
have to pull in texpresso which is completely useless. By default,
the features from before (excluding game_install) are included.
Also this creates a game_install feature for eventual Windows builds,
where unshield is not supported.
Removes another crate dependency, and it's only used in one place in the
code. Will eventually pick up the TODO and cut more bits off when
I get around to it.
Currently only the first two game patches are checked, eventually want
to check boot patching as well. Hopefully this should weed out the
remaining patching issues I encounter.
Now we support TexTools skel files, alongside the usual Havok packfiles.
Neither one has complete support (yet) but I'm exploring libraries to
accomplish them.
The dependencies are now commented to describe their usage and future
plans.
