Moved it from the SVN (at Cytoscape) to GitHub.

It was at
svn+ssh://grenache.ucsd.edu/cellar/common/svn/csplugins/trunk/toronto/ro
dche/cpathsquared-impl before today.
Improved tasks executions, initialization; started implementing download actions; plus, further cleanup...
Moved to internal classes
Moved some classes around, deleted obsolete ones, added the StaxHack; using the modified cpath2 client, etc..
fixed a couple of issues, did even more cleanup!

Now it successfully creates a CyNetwork after double-clicking on a top
pathway in the list, i.e., it works for top pathways if BioPAX download
option was set (default), but not - for SIF yet.., neither - for
non-pathway hits in the search pane yet (TODO)
improved the static factory, etc.
renamed, relocated several internal classes
Fixed wrong TaskManager issue; updated Reactome name to URL map...

Note: ExternalLink* staff needs re-writing from scratch, using Miriam
to resolve xrefs to URLs...
polishing (todo, generics, etc.)
Sif import works. Added clickable link in the detail panel. many other things...

Generalized/renamed former "GetByIdTask" (works for graph queries and
other formats as well).
Modify how it generates attributes from BioPAX model after SIF data
imported.
Modified in the cpath-client module  (not in this code base).
Removed "God" static factory class; cleaned; more download links work now; Started making advanced graph query UI...
moved/re-factored some classes and methods
Added Advanced Query panel with controls, actions, etc...
changes related to recent fixes in the cpath2 client and server
Search examples added to the label; disabled layout task (should be done by core biopax or sif app)
fixed several UI bugs and simplified search options
added BioPAX maven repositories to the POM
Edited the name, description and SCM info; renamed the main class.
UI pops up after search tasks are done.
Removed exclamation marks from UI messages.