QString::isNull() vs. isEmpty() discrimination is a time bomb ...

Also set build directory for profile reader.

Reviewed-by: kh1

All our classes should have the Maemo prefix because we don't have
a namespace of our own.

Task-number: QTCREATORBUG-1951
Reviewed-by: kh1

Also allow absolute file paths for deployables.

Reviewed-by: kh1

Task-number: QTCREATORBUG-1614, QTCREATORBUG-1810
Reviewed-by: kh1