Merge pull request #3 from jstockdale/master

Fix week calculation for almanac

Merge pull request #2 from mcuadros/master

srd_pluto: use default context when -N or -U aren't provided

Merge pull request #1 from mcuadros/patch-1

Update README.md

Fix error output in TUI status window.

Bug fix scaling of almanac numbers from sem format into subframes.

Show almanac date and time.

Gain option is now initial setting.

Use baseband auto filter BW.

Add runtime adjustable TX gain.

Add key binding help window.

Output calculated bandwidth.

Set sample frequency 3 MHz, bandwidth 2x sample frequency.