Bug 908296 - Catch all exceptions when importing psutil; r=ted

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extra : rebase_source : 7260ae283344fd8db3ef22923c33f9dc2166cc5f
Bug 905542: IsNull/SetNull functions for nullable unions should have bodyInHeader=True to prevent compiler warnings r=Ms2ger
Bug 908180 - Don't #include nsGUIEvent.h in nsIPresShell.h r=mounir