Created InterpolationUtils class with a method to fix the Euler Rotation Break problem
Create AdvancedPositionSplineInterpolation and AdvancedPositionLinearInterpolation which always use the shortest possible paths between the Euler Rotation values of the Camera's Yaw and Roll
Remove Position Keyframe filtering when adding the Keyframe. This is now done by the AdvancedPositionInterpolation classes
Made GuiDropdown only accept instances of GuiEntryListEntry to avoid unneccessary toString() methods returning the name
Added GuiEntryListValueEntry which holds a Value and a Name to be displayed
Continued work on GuiObjectManager