Prepare code for Qt 5 and clang 3.1

Everything po_clientplugins now compiles with Qt 5.
The sounds from basebattlewindow is missing since phonon is not included
with Qt 5 anymore, QtMultimedia might provide workaround.

Apple's clang compiler was used instead of gcc. Some changes of the code
were changed to reduce warnings with clang.

The code still compiles and works with Qt 4.8 and GCC 4.7
Merge remote-tracking branch 'lamperi/qt5compac' into qt5

Conflicts:
	src/PokemonInfo/pokemoninfo.cpp
made ready for windows qt5
more qt5 fixes
Merge branch 'qt5'

Conflicts:
	src/StatsExtracter/StatsExtracter.pro
	src/StatsExtracter/main.cpp
	src/Teambuilder/basebattlewindow.cpp