Doc: Remove unofficial Qt Concurrent headers

<QtConcurrentRun>, <QtConcurrentMap>, and <QtConcurrentFilter> are not
official headers. Developers should use <QtConcurrent> instead.

As a side-effect, this patch also stops the function documentation from
being duplicated (one copy in the QtConcurrent namespace page, one copy
in the \headerfile pages)

(For some reason, \brief doesn't work on standalone pages like these)

Change-Id: I9482f014acf52ba734a3fa597cdcc5931fcd7ecf
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>
Issue correct warnings with QObject::startTimer()

These are not specific to QTimer

Change-Id: Idcffab51a3277413889a727afa1cf7ce15171ec9
Reviewed-by: Olivier Goffart <ogoffart@woboq.com>
Doc: Fix miscellaneous typos

Change-Id: Iaf0dd8974c3ad78beffa995c596a76fb3e4cceab
Reviewed-by: Jerome Pasion <jerome.pasion@digia.com>
Reviewed-by: Kurt Pattyn <pattyn.kurt@gmail.com>
iOS: Build simulator libraries with suffix

Makes it possible to join two separate builds, and opens up for using
exclusive builds to do this.

Change-Id: I87ccbdd55511fdfbef3fe8b581f40525ebf077ed
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>