BUG: Fix CMake 3.x configuration warnings

Test done using CMake 3.0.20140413 (g94d5a)

Since project version is explicitly set, avoid warning by setting
policy CMP0048

Since ITKConfig.cmake append value to "ITK_LIBRARIES" and "ITK_INCLUDE_DIRS"
variables, let's make sure that "ITKFactoryRegistration" is not in the list
when configuring "ITKFactoryRegistration". This fixes the following
warnings:

//--------------
CMake Warning (dev) at Libs/ITKFactoryRegistration/CMakeLists.txt:55 (add_library):
  Policy CMP0038 is not set: Targets may not link directly to themselves.
  Run "cmake --help-policy CMP0038" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.

  Target "ITKFactoryRegistration" links to itself.
This warning is for project developers.  Use -Wno-dev to suppress it.
//--------------

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23099 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Update CTK project to include CMake configuration speedup

On Ubuntu 13.10 using CMake 2.8.11.2, an improvement of ~10%
can be observed.

Without CTK tweaks:

real	2m32.996s
user	2m26.225s
sys	0m6.820s

With CTK tweak:

real	2m19.957s
user	2m15.908s
sys	0m3.768s


$ git shortlog 233d87..909073a --no-merges
Jean-Christophe Fillion-Robin (18):
      Remove unused FindCTK.cmake module
      Ensure CTK_ENABLE_Python_Wrapping remain set when CTK_BUILD_ALL is ON
      Print message if CTK_{APP, LIB, PLUGIN} options set to ON because of BUILD_ALL options
      Fix dependency of Scripting/Python/{Core, Widgets} options
      Remove code referencing unexisting variable. See #449
      Remove 'CTK_WRAP_PYTHONQT_FULL' obsolete option. See #449
      Remove setting of INCLUDE_DIRS variable specific to PythonQtGenerator
      Move all PythonQt wrapping code into one script. See #449
      Optimize ctkMacroWrapPythonQt creating required source list in a single loop.
      Configure module init file at configure times. See #449
      Simplify how path of generated file are specified. See #449
      Simplify moc'ing of generated PythonQt wrapper. See #449
      Remove Light wrapping CMake script and directly invoke python executable
      Do not log PythonQt wrapping output. See #449
      Optimize QT4_GENERATE_MOCS macro getting moc flags only when needed
      Simplify QT4_GENERATE_MOCS. See #449
      Re-create python compile script only if needed and fix dependency. See #449
      Fix python script compilation removing inputs from custom target deps. See #449

Julien Finet (2):
      Fix ctkPushButton text alignment with no icon
      Emit ctkSearchBox::textEdited() signal when clear icon is clicked

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23100 3bd1e089-480b-0410-8dfb-8563597acbee