* cmake : detect support of c++11 via compiler flags
* cmake : show compiler version in summary
* debian/control : enforce minimal version of compiler and cmake
PeerTest from Charlie to Alice
* Makefile.linux : detect gcc version
Merge pull request #100 from hagen-i2p/cxx11-support

Detect c++11 support by compiler
use c++11 for 4.9 only
stop netdb tread immediately on termination
jump service