logm package name conflicts with Matlab logm function

[apjanke]

There's a Matlab logm function. Darnit.

This doesn't actually break usage of the logger, but it does mean that doc logm or help logm don't give you documentation on SLF4M; they go to the Matlab logm function instead. Minor darnit.

Alternative package names that don't conflict with Matlab stuff (at least as of R2019b):

• logger
• logg
• lg
• slf

[apjanke]

This was fixed in bc94821. I went with logger.