Updated the vanilla Qt to 5.2.1.
Merge commit '59aeb8c80a4e95bf542d08934f0ca6ab9b84d2a1'

* commit '59aeb8c80a4e95bf542d08934f0ca6ab9b84d2a1':
  StandAloneScrollBar components has been added. Private/ScrollBar.qml changes were reverted back.
  Added documentation to the ignore list.
  Added .gitignore and fixed the default mac config to use relative paths.
  Added Qt build config files:  - mac default config  - mac snow leopard config  - win default config  - win env settings
  Added Kirill's patches for Qt Quick.
  Added global scaling factor for fonts in order to get better control over font zooming on Windows/HiDPI.
  Added HiDPI/Retina fixes.
Merge commit '9ac9e512cd2decb1e5ddb5300fda07e11f90e13e'

* commit '9ac9e512cd2decb1e5ddb5300fda07e11f90e13e':
  Correct desktop style for StandAloneSrcollBar has been added.
Merge pull request #4 from climov/master

Updating ywm branch to vanilla Qt 5.2.1