Eugene Shalygin authored Jan 13, 2014 and Albert Astals Cid committed Jan 13, 2014

Includes some fixes from Albert:
 * kscreen cmake fixes
   Don't make libkscreen mandatory, give the proper version we need
 * Fix the @since
 * Kill Resolution and use a QSizeF
   I first thought QSizeF didn't make sense, but well what's a dpi if not a number of pixels in width and some others in height?
 * Remove unwanted const
 * Remove unneeded utils.h includes
 * Fix comments on realDPIXY()
 * Make it compile in non X11

REVIEW: 111829