Added cross to shape library.
match code style
Relative size plugin
Update sigma.parsers.gexf.js

Need to do : 
obj.y = - obj.viz.position.y; 

Otherwise the graph is up side down compared to what you had in gephi. Can be annoying for map for example.
Add timeout for Firefox to dragNodes plugin.  Closes #278.
Fix for overlapping nodes not being draggable
Fix case where initial node isn't considered current when it hasn't been left after entering/exiting an overlapping node
Remove check for over/outNode occurring multiple times. Unnecessary.
Fix comments
Better variable name for array of hovered nodes
Rework of hover logic to allow a single label to be displayed
Add self referenced nodes edge rendering.
fix 'mousedown' in _downHandler

'mouseup' was dispatched instead of 'mousedown' in _downHandler
add right click events

Add rightClick, rightClickStage, rightClickNode, and rightClickNodes
events
bind 'mousedown'
Merge remote-tracking branch 'origin/master' into captors-mouse-right-click
Merge remote-tracking branch 'origin/master' into fix-mouse-down
Add captor data to events

Add ctrlKey, shiftKey, altKey, metaKey to captor data and add captor
data to dispatched events.
add 'renderers custom edge shapes' plugin
add tapered edges