[m-rev.] diff: avoid module qualification in library interfaces where possible

[Julien Fischer]

Avoid module qualification in library interfaces where possible.

NOTE: this change does not affect the io module -- I've left that for a
separate change.

library/*.m:
 	As per the recent change to the coding standard, avoid module
 	qualification in library interfaces where possible.

 	Reformat declarations and descriptive comments to better utilise
 	any space freed up by the above.

<I've omitted the diff; it's very large and not very interesting>