some changes and test in mouse pressed (drag event not works in linux)

Signed-off-by: walter <info@kalwaltart.it>
added #include "string.h" due to memset error in linux

Signed-off-by: walter <info@kalwaltart.it>
added test.jpg and cout

Signed-off-by: walter <info@kalwaltart.it>
Merge pull request #2 from kalwalt/master

Modifications to works in linux OS