Refs #1969: Adds icon to Remove Mapping button.
Significant modifications to expose annotations functionality through annotations API.

Change-Id: I6f0984f839b182f692c12b94909627fb11dc81fb
Polished and moved files in cpath2-impl and biopax-impl in preparing for cpath2-impl removal and upgrading biopax reader plugin
(in Cy 3.1, biopax-impl will read BioPAX data and optionally convert to SIF or SBGN and delegate to corresp. apps, if any…)
Removed all services from the cpath2-impl bundle app (it's deprecated; will remove from the impl-parent and features.xml and move the sources out later)
Make sure to test canvas when looking at position

Change-Id: I8617f9578858c84257bda68c5eddf0bcb54e3916
Added support for TaskObserver's failed and cancelled methods
Added support for cancelled() and failed() to task observers
Added TaskObserver's cancelled() and failed() support to CommandHandler
New StringHandler for CyTable. Fix issue with MultipleList tunable. Add help string for CyTable tunable.

Change-Id: I68b16bdefa6a2b5744f8757db80100e668929797
Fixed issue with App Manager -- http://code.cytoscape.org/redmine/issues/2089
Updated work-swing-impl's task managers to TaskObserve's FinishStatus
Updated work-impl to TaskObserver's FinishStatus
Updated command-dialog-impl to reflect changes to TaskObserver's FinishStatus
Merge branch 'develop' of https://github.com/cytoscape/cytoscape-impl into develop
Clean up node context edit menu a little.  Move "Add Edge" and "Connect
Selected Nodes" to new "Add" menu and retitle appropriately

Change-Id: Iecebc683d697616f5b9666c12e7ad5376246f54b
Fixed NPE in the BrowserTableModel. Continue updating biopax-impl (fixed JAXB and StAX dependencies problems that came with added sbgn-converter)
Just changed CyRootNetwork and CySubNetwork toString implementation so the names of networks on the UI is more human readable (e.g. when using Tunables)
fixes #2112 so PNG is default
Merge branch 'develop' of github.com:cytoscape/cytoscape-impl into develop
Polishing the BioPAX reader app: tuned the file filter, almost fixed custom visual style and layout after network is created, etc…