+ Added FreezableTabWidget classes to Qaard Widgets.
+ Added aardvark_include.pri for quick-setting qmake projects to add the
  project root directory to INCLUDEPATH and DEPENDPATH. Applied to all
  relevant .pro files.
+ Added no_qt.pri for quick-setting qmake projects not to link to Qt. Applied
  to all relevant .pro files.
+ Added dummy qbs folder as the Qbs counterpart for the qmake folder.
* Qaard Widgets now depend on Aardvark Core.
* Added Export items to core.qbs and qaard/widgets/widgets.qbs.
* Fixed qmake other-files include in aardvark.qbs so it would not add
  EVERY *.pro and *.pri file in the project.
* Added cpp,includePath setting to root to all Qbs products that points
  to the project root directory.
* Included global headers to qaard.qbs.
* Included aardvark_include.pri to qaard_include.pri.