Bail out if we do not have a meaningful amount of data in the packet to work with.
Added support for 10.4 Tiger and PowerPC.
Added: Useful script to load built kexts.

(jwise: moved test_kext.command out of build directory (build directory
should be rm-safe).)
Added: Proper .gitignore.
Makefile: build the x86 one, not the ppc one
Put the xid_lock in the class.