QString: Use QChar where appropriate.

 * Add version number to .user-file.
 * Upgrade it from old versions.

Reviewed-by: dt

 * That is what everybody else is using now.

Reviewed-by: dt

 * This makes it easier to distinguish projects in the
   userfileaccessor

Reviewed-by: dt

Reviewed-by: dt

 * Make use of the ProjectConfiguration base class in the
   BuildConfigurations and update the factories accordingly.

Reviewed-by: dt

 * Use new BuildSteps interface (as seen in ProjectConfiguration).
 * Use new factory to construct/clone/restore them.

Reviewed-by: dt

Reviewed-by: dt

shared' libraries but not of 'static' dlls.

Done with: Thorbjorn

Trailing whitespace removal re-applied manually.

Conflicts:
	src/plugins/debugger/gdb/trkgdbadapter.cpp
	src/plugins/projectexplorer/projectexplorer.cpp
	src/plugins/qt4projectmanager/qt-s60/s60devicerunconfiguration.cpp
	src/plugins/texteditor/basetexteditor.cpp

doing it in 1.3 as well to avoid possible later conflicts

We should not polute the Qml Qt 4.6 namespace

See BAUHAUS-322

We should enable it again after we don't know of any errors any more.

Merge-request: 105
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@nokia.com>

Done with: Thomas