Partial frequency map coverage

[dncnwtts]

By default in TOD processing, an array of a full-sky map is written to disk. For high resolution partial sky maps this is a bit wasteful. An implicit pixel indexing, similar to hp.write_map(..., partial=True), would be useful for these cases.

[dncnwtts]

FITS outputs are dealt with in 1dee140, and is only turned on if the cut_sky=.true. flag is passed.

Still requires treatment for partial-sky healpix maps held in memory.