Update 0.71

This update mainly introduces the Camera behavior as an alternative to creating cameras directly via events. Behavior cameras will obey to the parent object's position and angle (if the property is set). Also keep in mind that the first behavior camera will be active automatically as it's created before events take place.

Here's the changelog:

• added B3D camera behavior
• added B3D point light behavior condition "Is enabled"
• added action "Set camera rotation" to the main plugin
• added expressions accordingly for camera angles
• fixed positioning issues for B3D point light behavior with unit resolutions different than the default
• removed "Add plane" action which was only meant for testing in early development