Remove exception safety tests

During Qt Contributor Summit 2013 we agreed that we will not support
exception safety anymore.

http://comments.gmane.org/gmane.comp.lib.qt.devel/12004

Task-number: QTBUG-32642
Change-Id: If57917fe8af45e787e215431c94579bc86fc7683
Reviewed-by: Simo Fält <simo.falt@digia.com>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>
Integrate gcov support into Qt build system.

To instrument a Qt application or library with the gcov coverage
tool, do `CONFIG+=gcov' in the application .pro file.

To instrument Qt itself with gcov, use the `-gcov' configure
option.

Change-Id: If24e91d95318609b0df1a76ed6d679bd92bcaab2
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@digia.com>
Reviewed-by: Frederik Gladhorn <frederik.gladhorn@digia.com>
Export getTimestamp to the native interface

The functionality to get the current x11 timestamp is also needed by
applications which need to interact with the X11 directly. With XCB
it is not possible to inspect the event queue and by that an
application is not able to retrieve the current timestamp using the
property change pattern and waiting for the matching event.

Change-Id: Ie7ba78ecbe509ed3a902c702266917f65bf5ad07
Reviewed-by: Gatis Paeglis <gatis.paeglis@digia.com>
Reviewed-by: David Faure (KDE) <faure@kde.org>
implement simple VFS to support caching during project parsing

sync up with qt creator - for qmake itself, this is just a minor
refactoring.

Change-Id: I833253f81c3159056fab2ff888f293b36cc2ef56
Reviewed-by: Daniel Teske <daniel.teske@digia.com>
(cherry picked from qtcreator/66802ef8bf7989dc025e34bf91d93576189c483c)
(cherry picked from qtcreator/69542826fa643a0fed2fc9e717f072c2852dc017)
(cherry picked from qtcreator/196424115338fb9a535810704b7d814d318b0462)
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>
QTreeView - allow users to control data in the treestructure

This patch allows to set which logical index the tree is in.

Before the tree always displayed data from the logical index 0,
but it is actually more likely that the user wants to have data
from visual index 0 (which can be done by special value -1).

There is nothing special about logical index 0, and not being
able to change the tree-data is just annoying.

Change-Id: Ib070ce93343a0d2fbac3ad5a42cb4359401ac87c
Reviewed-by: Stephen Kelly <stephen.kelly@kdab.com>