Version 0.4.7: a louder online band, AM, FM and SSTV

The program is updated to version 0.4.7. What we fixed:

• The online band is louder and cleaner, close stations come in at full strength.
• The sound no longer drops, and after a broken link the program comes back on the band by itself.
• The band is silent while you transmit, no echo.
• The voice goes through a compressor: no overload and no quiet words.
• The Talk button starts transmitting with one click.
• AM goes out with a carrier, and FM on 2 m and 70 cm is heard at any distance.
• SSTV pictures are received to the end.

The update installs by itself for everyone who has automatic updates on.