Love's Dozen burr puzzle

I coded this a while ago, but never got around to uploading it.
Now I've also found the [Burr Tool](http://burrtools.sourceforge.net/) software package, which can show you the solutons too!
Love's Dozen, as the name suggests, is of difficulty 12.3, however, there are multiple ways to assemble it, many of which are only of difficulty 1, and four are of difficulty 4.4 and a lot in between. Note that disassembly of this piece is tricky, as it has more than one degree of freedom. It's like