188 add Farnsworth timing to k1usn SST Contest

[w7sst]

Introduces Farnsworth timing for the K1USN Slow Speed Test (SST) only. #188.

The Farnsworth character speed is specified using the following MorseRunner.ini setting:

[Settings]
FarnsworthCharacterRate=25

To increase the spacing between characters and words, slow the sending speed down using the usual UI control. For example, a UI speed of 18 with the above .INI file settings, the resulting Farnsworth speed would be 18/25 (18 wpm using characters sent at 25 wpm).

Question: Can you think of an alternate name for MinFarnsworthWpmC? I struggled to find an appropriate name for the Farnsworth character speed. Perhaps FarnsworthCharacterRate=25?
Update: Scott suggested to go with FarnsworthCharacterRate. Thank you Scott!

[w7sst]

This represents my second version of the Farnsworth timing support. There are lots of comments in the code in VCL/FarnsKeyer.pas. There are also two papers mentioned describing the math used by this algorithm:

• https://morsecode.world/international/timing.html
• https://www.arrl.org/files/file/Technology/x9004008.pdf

Please see additional comments in the original issue #188.

[scotthibbs]

I like FarnsworthCharacterRate=25 better than MinFarnsworthWpmC. I think it's clearer than adding the "minimum" wording as people might confuse this with the minimum that the cw can be sent all together.

Once someone does code review, maybe another prerelease to test, while I work on getting the release wording and help files ready for the new version.

(BTW, I find it cool that we caught an original bug with the lack of spacing in the cw. What a cool catch that for years no one noticed.)

[w7sst]

I like FarnsworthCharacterRate=25 better than MinFarnsworthWpmC. I think it's clearer than adding the "minimum" wording as people might confuse this with the minimum that the cw can be sent all together.

I'll change it over to FarnsworthCharacterRate. Thank you for the input. Cheers.