fixed pie chart display bugs
Added probing for CytoscapeWeb tool.
Merge branch 'master' of github.com:IVPR/Weave
Feature 924 Add option to draw lines between polygons to visualize some
relationship
Curve Line
Display value in the middle of the line
Remove the option of drawing curve line
Add the option of displaying value in the middle of the line
fixed compile error
registering editor
verify function now checks for valid xml
fixed null pointer error
removed width/height constraints
better trace message
now using ControlPanel.openEditor() in more places.
commented out button
added checks for disposed objects

Change-Id: I6fa21570e361576696f40fb7dbff001b309e8c29
added support for tools that change their list of selectable attributes

Change-Id: Iae860330f3af09a2a6f327a2fc181b7be10450c1
line chart: added support for group-by attributes in attr selector and
renamed xAttributeColumns -> xColumns.
added test cases.

Change-Id: Icb273b7aac082d9a1d6af38b4f7ecc34d309a18d
Renamed linkable boolean to avoid values from old session states.
Removed unnecessary code from DraggablePanel.
fixed null pointer error