Audio Mastering gets on the Audiobus and more

Audio Mastering is on the bus. Here' what's new:

• Supports Audiobus as Effects or Output.
• Recording from Audiobus Effects/Output or from external input.
• Record button on Audiobus connection panel.
• Auto start recording at signal presence.
• Solo mode for Equalizer bands.
• High-quality sample rate converter to 44/48 kHz with 16/24 bits.
• Some minor bugs fixed.