Adding python (simple web server). Change netstat (deprecated).

[python] Simple web server and basic smtp server in python ;-)
[netstat] Add warning on netstat: netstat is deprecated and add the new command.
[dd] Add simple sample
[gcc] Add sample for x64, Windows GUI, full debug, system include
[grep] Add looking for 'myText' in a list of files.
[wget] Add download head and output to stdout.