"New build based on revison 12553"
Fix compiler warning: defined but not used

../Sources/yapi/ytcp.c:118: warning: ‘yNetLogErrEx’ defined but not used

This is because yNetLogErr() (or yNetLogErrEx()) is used only in code
compiled when Y_UPNP_DETECT is defined.

Y_UPNP_DETECT is _not_ defined by default so the compiler generates the
warning
Merge pull request #11 from LudovicRousseau/fix_1

Fix compiler warning: defined but not used
Remove compiled libraries
Fix compilation with MinGW
Add an example of QT application that use the lib
Fix typo in comment