Fix #153 Log and Error Notification System

Added a log window accessible through the help
menu. Added a widget to the Record status bar
that displays the latest high priority message
with a status icon to indicate the type of message.
Added ComboBox for Quality selection
Ogg Output settings now modified by quality selection
Add Audio/Video quality saving to config. All output plugins except WebM now affected.
Added bitrate/quality customization to Ogg Icecast.