CWA test fixtures
-----------------

`axivity_ax3.cwa` and `axivity_ax6.cwa` are truncated copies (32 sectors = 16 KB
each) of `ax3_testfile.cwa` and `ax6_testfile.cwa` from the GGIRread project:

    https://github.com/wadpac/GGIRread/tree/main/inst/testfiles

Copyright Medical Research Council UK and Accelting.
Licensed under the Apache License, Version 2.0:

    http://www.apache.org/licenses/LICENSE-2.0

Modification: truncated to 32 sectors (1024-byte header + 30 data sectors) to
keep the committed test data small. Truncating a CWA file at a sector boundary
preserves the format.
