Merge branch 'master' of github.com:rrobinett/wsprdaemon

Update README.md

Fix astal crashes at high and low latitudes

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fix git installation lines

add ARM64 support

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Update version features

Merge pull request #11 from rrobinett/v2.8

V2.8

Fixed overload of wsprnet.org DB server

Merge pull request #3 from rrobinett/pythonpipe

 Suppress Python error messages "sys.excepthook is missing"

Update README.md