Changes Version 1.0.10:
Initial test version for Particle Gen3 mesh.
Changes Version 1.0.9:
This version of SdFat has been modified to use standard POSIX/Linux definitions of open flags from fcntl.h.
Open flags are access modes, O_RDONLY, O_RDWR, O_WRONLY, and modifiers O_APPEND, O_CREAT, O_EXCL, O_SYNC, O_TRUNC.
The mods required changing the type for open flags from uint8_t to int so bugs are likely if any uint8_t local variables were missed.