1. added "color : no" to default config.yaml to disable ansi term colors.  Not configurable from webgui.  Needed to make post-processing script more readable.
2. changed default conversion to yes
3. changed default replaygain value to disabled.
4. changed default convert opts to CBR 320kbps
5. changed default maxbitrate to 0.  setting this to zero will ensure no conversion takes place on mp3s.  conversion will only take place on other supported formats, using the convert opts