Log Message:
Update to 0.15.1:

v0.15.1 (2015-06-18)
======================
	-- fix window transparency
	-- fix displayfd Xorg version check: require version 1.13
	-- fix GUI debug script on OSX
	-- fix typo in list of supported X11 atoms
	-- fix exit-with-children: support sharing mode
	-- fix html option for client only builds
	-- fix pulseaudio not killed on exit on Ubuntu
        -- fix signal leak when client disconnects
	-- include shared mime info file mapping
	-- blacklist Ubuntu Vivid, which broke Xdummy, again
	-- don't reject clients providing a password when none is expected
	-- raise maximum clipboard requests per second to 20
	-- remove old VP9 performance warnings