Aperture

This small patch adds a couple of neat features and fixes few annoying bugs.

Compatible with McLib 1.0.3. It doesn't mean that future versions of McLib would be incompatible, but older versions are most likely incompatible.

• Added forward option to look modifier which makes the camera face forward based on the direction of movement (suggested by terbin)
• Added dope sheet GUI for the keyframe fixture (i.e. the All keyframe fixture channel)
• Added an overlay camera option in camera editor (suggested by Lolik)
• Added fixture preview loop (suggested by Agirres)
• Added duration marker for playback scrub
• Changed flight mode to disable when player starts scrubbing (or switching between stuff)
• Changed camera options' height to be relative to the fixture editor area
• Changed interpolation list vertically responsive (suggested by Agirres)
• Changed internal representation of position from float to double (suggested by terbin for far away recording)
• Changed drag modifier to handle normalization of yaw
• Changed channel buttons (All, X, Y, Z, etc.) in the keyframe fixture editor
• Fixed duplicate camera profile not showing duplicate profile in the list
• Fixed overlays not rendering relative to playback scrub
• Fixed outside mode copying actual player location (reported by Braigar)
• Fixed edit position not working properly with modifiers