[energy] Hydro Turbine!

first version.
1. the liquid consumption rate / power generation rate needs to be
tuned.
- if consumes liquid too slow, it doesn't feel like a turbine...
- if consumes too fast, generating too much power at once would be
unbalanced I guess...
2. needs artwork badly (I'm such a bad artist >___<)
3. BUG: wire node doesn't connect for some mysterious reason which I was
unable to find out.
4. due to the BUG, it can only be found under tabula rasa, no proper
recipe yet.