Fix crash due to the cache
Merge branch 'workshop' of https://github.com/MrKepzie/Natron into workshop
Always trigger a render when restoring defaults.
Fix the blackimage bug when using an identity effect
Fixed colour picker bug with 2 inputs of different size
Avoid maths errors in the intersection call
Don't autosave when loading
Fix bug in the restoration of the Project GUI which wouldn't be OK when
Natron would detect "empty" projects.
Fix bug when closing children splitters.
Updated icon sets provided by JC

Also added a setting in the preferences (NodeGraph) to change between
the default icon set and the black&white icon set.
Attempt to speed up the file dialog a little bit
Update sequence parsing + fix bug in the loading of the OCIO config
Track memory chunks used by a plug-in and delete them when deactivating
a node.
+ Bug fix with autosave
better handling of infinity
Add a « Close Project » menu, and warn about missing exitApp() function