measures.ini is looked for in Athlete's config folder,
it should have a section for each measures group,
nutrition data with Energy and Macros is provided as example.
Moved default weight to About and removed RiderPhysPage and created
a tab for each measures group under Measures.
MeasuresPage handles conversion between metric and imperial units
Generalized CSV import with configurable headers.
MeasuresDownload enables download from Withings/Todays Plan only for Body
measures.
This is Part 1/2 of #2872
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