iOS build instruction.

copy the following files at the root dir
cp config.h ../..
cp gcompris.pro ../../

At root dir create the directory
mkdir rcc
mkdir translations

And fill copy the appropriate files in them.

Create a build directory:
mkdir build-ios
~/Qt5.5.0/5.5/ios/bin/qmake ../gcompris.pro
open gcompris.xcodeproj

Fix the Launch reference to point the Launch item in the xcassets
