Remove qSort usage from rcc

QtAlgorithms is getting deprecated,
see http://www.mail-archive.com/development@qt-project.org/msg01603.html

Change-Id: I09dc82b7f9509f73c7b8b9c16a08fefb8ca0b8a5
Reviewed-by: hjk <hjk121@nokiamail.com>
Fix compilation on BlackBerry Playbook

Implement pps_decoder_is_integer() function, which is not present on Playbook
by default.

Change-Id: Iff0974f3f178bf9c39aa05b4e1be87b2b7a9344e
Reviewed-by: Peter Hartmann <phartmann@blackberry.com>
Reviewed-by: Thomas McGuire <thomas.mcguire@kdab.com>