Added #include <unistd.h>; thanks Dimitrios Bogiatzoules
added link dependency to libdl
Fixed additional include directories for sml,microhttpd. Stop on error
Some fixes to MySmartGrid API
Support serial SML meters which require DTR power supply
Some debug code
Removed debug code
Merge branch 'c++-port' into develop

Conflicts:
	src/api/Volkszaehler.cpp: whitespace issue
Ignore autogenerated files