BUG: Fix spacing buttons in slice controller widget

Ensures automatic spacing button in slice view controller widget toggles automatic spacing on and off, and updates the icon in the widget to reflect the spacing mode. Ensures automatic spacing, manual spacing, and field of view buttons are synchronized with MRML slice nodes. Ensures automatic spacing, manual spacing, and field of view buttons for each of R, Y, G update together appropriately when linked. #2993, in part similar to #2676-2685.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21893 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Fixed issue with SetSceneReference and bug 3067

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21894 3bd1e089-480b-0410-8dfb-8563597acbee
STYLE: Display Slicer revision at configuring time. Fixes #2020

See http://www.na-mic.org/Bug/view.php?id=2020

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21895 3bd1e089-480b-0410-8dfb-8563597acbee
STYLE: Change configure time message to use main application name.

If SlicerApp_APPLICATION_NAME is set to "Foo", message like the following
will be displayed instead:

-- Configuring Foo version [4.2.0-2013-04-16]
-- Configuring Foo revision [21891]
-- Configuring Foo for [linux-amd64]

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21896 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: External link in extension manager now open in browser. Fixes #3045

To determine if a link should be open in the extension manager or in an
external browser, the "host" of the clicked url and the server url are
compared.

See http://qt-project.org/doc/qt-4.8/qurl.html#setAuthority for more details.

See http://www.na-mic.org/Bug/view.php?id=3045

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21897 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: 3060. Made 
const std::vector<vtkMRMLDisplayNode*>& vtkMRMLDisplayableNode::GetDisplayNodes();
 - Obsolete
 utility function that provides an unsafe API. Please use GetNumberOfDisplayNodes() and GetNthDisplayNode() instead 

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21898 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: 2916. Moved vtkSlicerModelsLogicAutoRemoveTest into the data module testing directory and use a datamodule logic instead of a models logic. Removed unused AutoRemoveDisplayAndStorageNodes  property of vtkSlicerModelsModuleLogic.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21899 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: 3009. Updated vtkMRMLScalarVolumeDisplayNode visualization pipeline to fix alpha compositing problem.
See diagram in http://na-mic.org/Mantis/view.php?id=3009 for more details.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21900 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: 2970. Reverted changes to Chart colormaps.

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21901 3bd1e089-480b-0410-8dfb-8563597acbee
BUG: Fix lost on focus when modifying spinbox

Previously, the spinbox would lose focus when modifying the value due to
an update by the node. Using the new ctkSpinBox that actually checks
if the values are the same before updating fixes this.

See Issue #2986

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21902 3bd1e089-480b-0410-8dfb-8563597acbee
STYLE: Reorder CLI description XML elements

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21903 3bd1e089-480b-0410-8dfb-8563597acbee
ENH: Add drag&drop support for registered IO dialogs.

To support drag&drop, a qSlicerFileDialog derived class should reimplement:
 * qSlicerFileDialog::dragEnterEvent()
 * qSlicerFileDialog::dropEvent()

By default, qSlicerDataDialog supports drag&drop.

Issue #3081

git-svn-id: http://svn.slicer.org/Slicer4/trunk@21904 3bd1e089-480b-0410-8dfb-8563597acbee