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
Add API endpoint for _view_changes
squash this later
forgot to add replicator. Squash later