Note that developer can still specify a different version of Qt passing
 the CMake variable "Slicer_REQUIRED_QT_VERSION"

For example:

  $ cmake -DSlicer_REQUIRED_QT_VERSION:STRING=4.8.0 -DQT_QMAKE_EXECUTABLE:FILEPATH=/home/jchris/Projects/QtSDK-1.2/Desktop/Qt/4.8.0/gcc/bin/qmake ../Slicer4

git-svn-id: http://svn.slicer.org/Slicer4/trunk@20069 3bd1e089-480b-0410-8dfb-8563597acbee