OBS Multiplatform 0.9.0

General Changes:
* Added video/audio filtering; you can now access filters for a source by right-clicking the source and then clicking 'Filters' from the popup menu.  These filters can be applied to any compatible source.
* Added filters: Chroma Key, Color Key, Color Correction, Video Delay, Image Mask/Blend, Crop
* Added media source (plays video/audio media via FFmpeg)
* Added Blackmagic device capture source to capture Blackmagic devices (Mac, Linux, Windows)
* Added visibility indicator to the source list to toggle visibility in the current scene
* Added mute button to sources on the mixer
* Added option to select different themes in general settings
* Added a dark theme
* Added a menu option to view the current log file in the help menu
* Fixed an issue where service-specific settings would not be set again when changing encoding settings

Linux Changes:
* Added an option to video device capture to optionally buffer the video (off by default to reduce potential lag issues with webcams)
* Made various improvements to video capture on Linux

Mac Changes:
* Added an option to video device capture to optionally buffer the video (off by default to reduce potential lag issues with webcams)
* Fixed an issue where game capturing (syphon) wouldn't work on 10.8
* Fixed an issue where certain mac audio outputs with channels > 8 wouldn't play, now will be forced to stereo if needed

Windows Changes:
* Made devices turn on by default when creating a video device capture source rather than off by default to prevent confusion for users
* Fixed an issue where canceling settings would cause the video to freeze
* Fixed an issue where games wouldn't initialize with game capture sometimes, or would take a really long time to initialize (especially CS:GO)
