Remove obsolete Qtopia-related bits from qtmail.

Change-Id: I021570bce26529adfbfb4080b18b87df74bc2c18
Reviewed-by: Matthew Vogt <matthew.vogt@qinetic.com.au>
License fixes.

Change-Id: I0b2f39c02f94e7c057679314c2d5dad11ea271e8
Reviewed-by: Simo Fält <simo.falt@digia.com>
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>