Travis: Drop R15 build, add 17.1
Support passing in a complete URL for deps

closes #268
Make N value in dev/run configurable

This commit makes N (the number of development nodes spun up)
a command line option. It also fixes a magic number which was
preventing the value of N from changing the number of nodes
spun up.

Closes COUCHDB-2324
remove duplicate CSP section
Renamed AUTHORS to COMMITTERS
Add missing committers
Fauxton: remove almond.js license

was removed in couchdb-fauxton in #c7fbc1a
Enable CSP support for /_utils per default

With Futon getting removed in 2.x, which had too much inline-
JavaScript etc., is not used any more. Fauxton is able to work
with our default CSP settings.