Adding Signal based on Core / C++11 standard

[asmodehn]

[asmodehn]

The goal is to cover the same feature set as sigc++, but threadsafe.

[asmodehn]

For simpler signal slots, check http://code.google.com/p/nano-signal-slot/source/browse/nano_signal_slot.hpp

For thread safe implementation : http://helloworld922.blogspot.kr/2013/07/thread-safe-signalsslots-using-c11.html