KAZOO-2002: add curl helper docs
KAZOO-2002: move view back to using integers
KAZOO-2002: fix test target in makefile
KAZOO-2002: fetch rates by deconstructing dialed number and generating a list of keys

If "+1234567890" is dialed, create a list of keys for the view lookup:
[1, 12, 123, 1234, 12345,...] rather than a range using string comparisons.

Result set is much much smaller from couch, much faster response, and easier to match/sort
KAZOO-2002: cleanup maintenance module with specs, formatting, decomposition