bump version number
Holy buffer overflow Batman!

Somehow I had never knowingly triggered this, but apparently it would have
been super easy to SEGFAULT PyDAW into oblivion on a busy item, although
I think it's obvious that it wasn't THAT likely to happen (ever) in normal
usage...

Allocate 256 of each event type, I may go even higher in the future since
PyDAW's back end is written in C and has predictable (and small) memory
usage...  More checks that this isn't being violated will be added later.