Android build compiles and works well. Introduced new class KPaths that

is a wrapper for QStandardPaths. The reason behind creating KPaths is
that in Android all app files are installed in location that can't be
resolved by QStandardPaths. If the target platform is Android,
KPaths::locate and KPaths::locateAll will first check all standard
locations and then special for Android location (assets). Otherwise it
simply calls QStandardPaths's locate and locateAll respectively. Also
changed a splash screen to fit better to mobiles.