Support FIT files with developer fields

[laufhannes]

Here's an example fit file that fails to display properly: 56683738298.zip

While that's the real track:

I guess this is due to pierremtb/easy-fit#24. Maybe it's easy to switch to https://github.com/jimmykane/fit-parser for parsing fit files?

[erik]

Thanks for the heads up!

Looking at the changelog for that fork, doesn't seem like there are any breaking API changes, so hopefully this is a quick drop-in replacement. I'll give this a shot and see if it fixes the issue for your example file.

[erik]

Looks like that fixed it. Thanks again for reporting!