started to add travis [DONT MERGE]

[LinuxDonald]

No description provided.

[LinuxDonald]

g++ -c -m64 -pipe -O2 -Wall -W -D_REENTRANT -DNOMINMAX -DQT_NO_DEBUG -DQT_OPENGL_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_SHARED -I/usr/share/qt4/mkspecs/linux-g++-64 -I. -I/usr/include/qt4/QtCore -I/usr/include/qt4/QtGui -I/usr/include/qt4/QtOpenGL -I/usr/include/qt4 -I. -I/usr/X11R6/include -I. -I. -o main.o main.cpp
main.cpp:22:34: fatal error: QtWidgets/QApplication: No such file or directory
 #include <QtWidgets/QApplication>

[LinuxDonald]

@jakoch maybe you know whats wrong?

[jakoch]

Needs porting to Qt5 - #7, see https://travis-ci.org/fifengine/fifengine-atlas-creator/jobs/185223682#L473