ENH: slicer.util.VTKObservationMixin: removeObservers now accept no params

The method 'removeObservers' allows to easily remove all observers without
specifying all the method one by one.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23631 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Always set SOURCE_DIR variable for CLI modules

This commit will allow ResampleScalarVectorDWIVolume to be built
even if ResampleDTI is disabled.

This is needed because ResampleScalarVectorDWIVolume references
the source of ResampleDTI using the variable ResampleDTI_SOURCE_DIR

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23632 3bd1e089-480b-0410-8dfb-8563597acbee
COMP: Add python executable path to build tree launcher PATH settings.

This commit will allow to directly use python executable after
starting a terminal using "./Slicer --gnome-terminal" or after setting
the Slicer environment.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23633 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: slicer.util: Add NodeModify context manager

This commit adds a convenience context manager allowing to easily
disable modified event associated with a node, and automatically re-enable
them and invoking them if it applies.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23634 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: EditBox: Simplify observation introducing the use of VTKObservationMixin

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23635 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Editor: Effects are checkable and updated based on the parameter node

This commit ensures the button effect are checked or unchecked based
on the 'effect' property stored in the parameter node.

It also extends the EditUtil API adding function allowing to more easily
set and get the 'EraseLabel' state.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23636 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Allow BRAINSTransformConvert without output transform file

$ git shortlog 68303b3..4fb59c3
Kent Williams (1):
      COMP: Allow BRAINSTransformConvert without output transform file

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23637 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Integrated BRAINSTransformConvert as original cmd did not work with BRAINS anymore

git-svn-id: http://svn.slicer.org/Slicer4/trunk@23638 3bd1e089-480b-0410-8dfb-8563597acbee