Make GPS intervals output a gps directory

[eagoetz]

GPS intervals were output inconsistently with day/week/month mode. Now they will output to gps/start-end/ instead of start-end/ to be consistent between the modes.

Closes #336

[codecov]

Codecov Report

Merging #341 (1af35fd) into master (06e8250) will not change coverage.
The diff coverage is n/a.

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##           master     #341   +/-   ##
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  Coverage   50.31%   50.31%           
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  Files          60       60           
  Lines        8658     8658           
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  Hits         4356     4356           
  Misses       4302     4302           

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macOS	50.31% <ø> (ø)
python3.10	50.31% <ø> (ø)
python3.7	49.51% <ø> (ø)
python3.8	50.31% <ø> (ø)
python3.9	50.31% <ø> (ø)

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[duncanmmacleod]

@eagoetz, what problem is this change designed to solve? I think this creates an unnecessary level of hierarchy that is non-intuitive to the reader.

[eagoetz]

@eagoetz, what problem is this change designed to solve? I think this creates an unnecessary level of hierarchy that is non-intuitive to the reader.

The problem is that the gps mode does not follow the <mode>/<epoch> structure that day, week, and month modes follow. This PR solves this inconsistency.

I'm not sure I understand why this is non-intuitive. Can you clarify?

[duncanmmacleod]

@eagoetz, what problem is this change designed to solve? I think this creates an unnecessary level of hierarchy that is non-intuitive to the reader.

The problem is that the gps mode does not follow the <mode>/<epoch> structure that day, week, and month modes follow. This PR solves this inconsistency.

I'm not sure I understand why this is non-intuitive. Can you clarify?

I'm pretty sure I'm overthinking it. Most of the important GPS pages I generated had symlinks so memorable names ('O3') so the underlying gps/1234567890-1234567890 was never seen by the user.

Anyways, carry on.