Fixed: scroll wheel speed is way to low in firefox

I increased scroll wheel speed to a sensible value
formatting
Fixed: Ivars with accessors in a Category failed with duplicate ivar error
symbolic constant
FIXED: Error when binding several objects to the same objectController.selection.keyPath and objectController selection changes. Fixes issue #2039
fix for menu enabled state not beeing visually updated upon change
Fixed: Added test case
added manual test
Here is an ojtest for this issue.
Fixed: unsigned delegate methods of CPTokenField erased by CPTextField

Previously, the unsigned delegate methods _implementedDelegateMethods was erased by the CPTextField, so some delegate methods didn't work any more.
This PR just renames the unsigned delegate methods to _implementedTokenFieldDelegateMethods.
Added: added unit test for CPTokenField
fix cpcollectionview height issue
correction of height calculation
fix for missing textFieldBackgroundColor support
apply to contentView instead of bezelView
manual test
introduced cocoa methods for background color
changed test to use cocoa api
correction of typos
Test: Added Tests for non-english locales

CPDateFormatter only supports the "en" locale by default. All other locales yield empty results for most symbols. The tests added ensure, that the english "default" values are returned if no specific data is available (which is currently the case for every locale except "en").