Implementing GUID using boost

I haven't taken a look at the hash table stuff, so I didn't touch that, but I was able to get rid of our (respectable!) guid random number seeding stuff in `guid_init`, etc. I ran the test suite and uncovered one problem which I was able to fix. I also started the program with a moderately sized chart and transactions (my mom's business's books), and everything seems good.
You're right. I used to have `new char...`, but changed it to malloc very recently, and somehow forgot the `delete`, thanks for catching that! (sheesh, I even explicitly said "which will use free (not delete)".)