windows_examples: add check_winmain_params program
windows_examples/dll_thread: create an example DLL which uses TLS
windows_examples: enable ASLR and DEP with built programs
windows_examples/check_internals: remove duplicated "at"
windows_examples/dll_thread: report if the DLL is used with LoadLibrary

Follow documentation of DllMain from:
http://msdn.microsoft.com/en-us/library/windows/desktop/ms682583%28v=vs.85%29.aspx