This reverts commit a8398f25.

AFAIK, this configuration is not tested on the dashboard. Error before patch :

cmake -DCMAKE_CXX_FLAGS=-std=c++11 -DUSE_SYSTEM_SWIG=OFF -DOTB_WRAP_PYTHON=ON ~/dev/src/otb/SuperBuild/

Call Stack (most recent call first):
  CMake/SuperBuild_Macro.cmake:56 (include)
  CMake/External_otb.cmake:79 (ADDTO_DEPENDENCIES_IF_NOT_SYSTEM)
  CMakeLists.txt:326 (include)

CMake Error at CMake/External_swig.cmake:60 (ADD_SUPERBUILD_CONFIGURE_VAR):
  ADD_SUPERBUILD_CONFIGURE_VAR Macro invoked with incorrect arguments for
  macro named: ADD_SUPERBUILD_CONFIGURE_VAR
Call Stack (most recent call first):
  CMake/SuperBuild_Macro.cmake:56 (include)
  CMake/External_otb.cmake:79 (ADDTO_DEPENDENCIES_IF_NOT_SYSTEM)
  CMakeLists.txt:326 (include)

CMake Error at CMake/External_swig.cmake:61 (ADD_SUPERBUILD_CONFIGURE_VAR):
  ADD_SUPERBUILD_CONFIGURE_VAR Macro invoked with incorrect arguments for
  macro named: ADD_SUPERBUILD_CONFIGURE_VAR
Call Stack (most recent call first):
  CMake/SuperBuild_Macro.cmake:56 (include)
  CMake/External_otb.cmake:79 (ADDTO_DEPENDENCIES_IF_NOT_SYSTEM)
  CMakeLists.txt:326 (include)

An assert caused a crash when GrayDynamicsParams was set to the same
value twice.

Some assert( layerStack->GetCurrent()!=NULL ) have been replace because
GetCurrent() of a layerStack can be null if no image is open.

And those functions can be called with keyboard shortcuts.

This projection bar widget is used to edit the selected
projection zoom level.

Conflicts:
	CMakeLists.txt