New tincd post-auth BOF exploit module

A pull request to get some feedback. I'd appreciate if you comment as well on the following:
- additional class in module (if it should be relocated, an example would be helpful, e.g. which mixins etc.)
- puts calls in the additional class
- exploit development and other comments welcome?
- Fedora ROP is on my TODO list (but I wanted to contribute the module before Christmas/holidays)
- Although I left "average ranking" in there, the exploit works for all targets with several tested (meterpreter, reverse_tcp, exec) payloads on the first execution run and is therefore very reliable.
I know and I had it like that and to my programmer eyes that looks horrible. I don't remember which one but one tool didn't like it (or I just wished it so hard that I'm imagining something now). Anyway I don't care anymore, now it's just data and I hope that makes ruby people happy.