Set the variable to force the RVCT version when building for
Symbian using SBSv2. This is currently hardcoded to version 2.2
since we do not yet support RVCT 4.

Now that we have 2.0 out we can be less strict when checking
project consistency when loading .user files.  The strictness
was necessary due to upgrading non-target projects to target
projects.

 * Allow for invalid Qt versions when loading a .user file that was not
   updated from the pre-target era.
 * Update the UI to show invalid Qt versions as invalid. Remove
   the Invalid version as soon as a valid one is imported.

This does preserve the buildsteps, too.

Reviewed-by: Alessandro Portale

Set environment variable to force GCCE version when running qmake
for symbian. This is only relevant for the SBSv2 build system.

Reviewed-by: kh1

Revised-by: Tobias Hunger

Nodded-at-by: dt

Reviewed-by: hjk
Reviewed-by: Christian Kandeler <christian.kandeler@nokia.com>

Reviewed-by: Tobias Hunger

It was badly positioned esp. in OS X and Windows.

Reviewed-by: kh1

Reviewed-by: Alessandro Portale

Fix README, some spelling errors, remove contractions,
exclamation marks, correct some plural forms, join split messages.
Add QCoreApplication::translate to non-Q_OBJECT-classes.
Fix some lupdate warnings about discarding meta-data (//:).

Add more error messages to processes run for toolchain detection.
Move Windows-specific code to dbgwinutils, remove inclusion of
<windows.h>. Fix MinGW gcc 4.5 warnings.

Reviewed-by: Alessandro Portale

Could not be tested with actual QML project yet.

Reviewed-by: kh1

Reviewed-by: Alessandro Portale

Give warnings about failures to be able to fix things/timeouts on
slow machines. Pass on arguments correctly on Windows.
Make sure processes are killed on timeouts.

Reviewed-by: kh

Also document remote gdbserver adapter's signal.

Was renamed weeks ago, somehow came back.

Parse script output instead.

Done-with: kh1

 * Explicitly set signing mode to SelfSigned if not mentioned in the
   .user file
 * Do not use c-style casts.

Reviewed-by: dt

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