Log Message:
Update to 0.15.4:

v0.15.4 (2015-08-02)
======================
	-- fix delta compression errors
	-- fix VP8 and VP9 performance when speed command line option is used
	-- fix application deadlocks on exit
	-- fix NVENC on cards with over 4GB of RAM
	-- fix csc Cython red and blue colours swapped on little endian systems
	-- fix byteswapping fallback code
	-- fix cleanup error on MS Windows, preventing process termination
	-- fix pulseaudio device count reported
	-- fix timer warnings in GTK2 notifier (mostly used on OSX)
	-- fix sound communication errors not causing subprocess termination
	-- fix Xorg path detection for Fedora 22 onwards
	-- fix invalid list of output colorspaces with x264
	-- fix bug report tool window so it can be used more than once
	-- fix bug report tool log file error with Vista onwards
	-- fix bug report screenshots on MS Windows with multiple screens
	-- fix shadow mode on MS Windows with multiple screens
	-- fix OpenCL csc module with Python3
	-- fix OpenCL platform selection override
	-- fix Python3 Pillow encoding level (must be an integer)
	-- fix capture of subprocesses return code
	-- fix Xvfb dependencies for Ubuntu
	-- fix ldconfig warning on Debian and Ubuntu
	-- fix warnings with X11 desktop environments without virtual desktops
	-- fix use of deprecated ffmpeg enum names
	-- fix client error if built without webp support
	-- include the CUDA pre-compiled kernels on Debian / Ubuntu (NVENC)
	-- packaging fixes for printing on Debian / Ubuntu
	-- updated dependency list for Debian and Ubuntu distros
	-- don't require a nonsensical display name on OSX and win32
	-- safer x264 API initialization call
	-- safer OpenGL platform checks (prevents crashes with wine)
	-- safer NVENC API call
	-- safer lz4 version checking code
	-- workaround invalid "help" options in config files
	-- ensure any client decoding errors cause a window refresh
	-- MS Windows build environment cleanup
	-- Fedora: update PyOpenGL package dependency