Enabled automatic updating to 4.2.0 on Windows
Bumped version to 4.2.1
Merge branch 'master' of github.com:UniversalMediaServer/UniversalMediaServer
Replaced deprecated default value for x264 CRF
Added x264_constant_rate_factor setting to UMS.conf and updated the MPEG-2 quality setting description
Formatting
Added single_instance to UMS.conf
Added note