Conflicting documentation on memory order

[lindstro]

The main help page says array dimensions should be specified in Fortran order:

https://github.com/rballester/tthresh/blob/02df038c6eb9e8003201cb1bd82c678387e4b4ec/src/tthresh.hpp#L98

But when specifying fewer than three dimensions, the documentation says C order:

https://github.com/rballester/tthresh/blob/02df038c6eb9e8003201cb1bd82c678387e4b4ec/src/tthresh.cpp#L187-L188