Updates in Cytoscape 2.8.1

Bug Fixes

• "Select All Attributes" button on the data panel selects the attributes in a sorted order.
• Added the ability to load a plugin from a local file
• Changed internal structures for group viewers to allow group viewer information about a group to be tracked before the group viewer is actually registered
• Added a "discrete layout" setting for ForceDirected so that the force directed layout will now always give the same answer
• Cleaned up XGMML group reading and writing
• Several fixes to group handling
• Minor fixes to tunable presentations