* added Undo support to basic operation:
 - ROI add/remove
 - ROI properties change (color, stroke...)
 - sequence operation (remove channel, change dim)
* added plugin usage statistics.
* added user account link support.
* Canvas2D:
 - added area selection (Ctrl key + mouse drag)
 - added message when there is not enough memory to display image
* FileUtil.getApplicationDirectory() modified a bit.
* ROIPanel : fixed sorting on position and size.
* MainInterface:
 - added getUndoManager() method to retrieve the active Sequence Undo
Manager.
 - added undo() and redo() methdos for fast undo and redo on the active
Sequence.
* PluginDescriptor:
 - added isBlundled() method to know if this is a bundled plugin
(several plugins inside the same package)
 - added isKernelPlugin() to know if this plugin is bundled in the
application.
* PluginLauncher: some changes with plugin launch operation.
* Plugin: added getName(), isBundled() and getOwnerClassName() methods.
* ROI:
 - added copyFrom(ROI) method to obtain a ROI copy.
 - added getPropertyValue(..) / setPropertyValue(..) for generic
property get and set operations.
* MetaDataUtil: added getSizeX/Y/Z/T/C() and setSizeX/Y/Z/T/C() methods
* Sequence:
 - added copyFrom(..), copyDataFrom(..) and copyMetadataFrom(..)
methods.
 - added createUndoPoint(..), createUndoDataPoint(..), 
createUndoMetadataPoint(..) and AddUndoableEdit(..) methods to create
complete, partial or custom restore point for undo operation.
 - added undo() and redo() and clearUndoManager() methods
 - added getSelectedROIs(Class<? extends ROI> roiClass..) to retrieve
selected ROI of a specific type only.
* added SequenceUtil.getCopy(Sequence, copyROI, copyOverlay, suffix) to
get a copy of the specified sequence with specific options.
* added new methods to DateUtil.
* minors fixes and tweaks.
version change