(bundles) Remove references to net.sf.orcc.graphiti.*
(ui) Remove old graphiti-editor properties definitions
Remove useless transformations
(ui) Remove useles references to xtend-gen
(core) Update JGraphT library to 0.9.0 and use it as a jar
(jgrapht) Remove useless JGraphT plugin
Remove useless net.sf.orcc.graphiti.* plugins
Remove useless graphiti-editor plugins from Orcc

Removed:
 - net.sf.orcc.graphiti.model
 - net.sf.orcc.graphiti.ui

JGraphT library is now used in only 1 plugin (net.sf.orcc.cal), so it has been integrated
directly as library in this plugin. It has also been updated to 0.9.0