DynamicTexture OpenGL texture deletion now occurs in the OpenGL main thread.
destructing MainWindow at exit.
removed log message.
moved SDL initialization into the main thread to avoid race condition with Python console.
attempting to open content not found on the filesystem will given an error image. helps with broken state files or Python scripts.
streaming protocol now supports frame index specification. this is for stream synchronization between multiple segments / connections.
freeing libjpeg-turbo handle in streaming library.
added option and UI for toggling streaming synchronization.
stream synchronization support across multiple connections / segments.
PixelStream textures are now deleted by the main thread.
also clearing PixelStream objects for blank segments.
added support for SVG vector graphics, and extended network streaming interface to support SVG streaming.
Fix Ubuntu build
Merge branch 'master' of https://github.com/gregjohnson/DisplayCluster

Conflicts:
	src/lib/dcStream.cpp
Fix Ubuntu build
Fix connect to DisplayCluster
Make finder aware of external sources