fix #340 : Scroll to zoom in IE9 and 10
Check mousewhell source

If source is not overlay then do not zoom graph as this event comes from some other container.
As by specification mousewhell event bubbling can't be stopped, the only right solution is to check it's origin in all watchers.
Navigator: add navigator source files
Navigator: add navigator examples
Navigator: add navigator documentation
Navigator: add navigator tests
add style to json
Merge pull request #354 from bumbu/navigator

Merge Navigator Plugin into Cytoscape.js
Merge pull request #353 from gerardohuck/master

Added CoSE Layout
Merge pull request #343 from bumbu/fix343

Check mousewhell source
Merge pull request #342 from bumbu/fix340

fix #340 : Scroll to zoom in IE9 and 10
more events testing (cxttap*)
tests for edge add/remove
add ignore if not defined for bad browsers like ie; fixes #341
should fix #289
fix for #327
fix #358
potential fix for #347
more stable fix for ready issue
fix #367