Added support for the rsl366 protocol

I've added a protocol for the RSL366R sockets. The protocol has been requested [on the forum](http://forum.pilight.org/Thread-RSL366T-Switches). These are the same switches [RC-Switch](https://code.google.com/p/rc-switch/) was made to work with. 

The sockets have 2 selectors, each with 4 values (1 to 4) thus allowing for 16 switches to co-exist and be controlled independently. I've test all possible combinations and they work through pilight.

I've used impuls.c/h and rewritten the appropriate parts, so there might be some irrelevant leftover code from the impuls protocol. I was not quite sure what the parseCode function was supposed to do so it will benefit from some code review.
Can you update these lines to pilight 5.0. Check the other protocols.