more utilities for time duration and string surrounding
port ranges on localhost skip privileged ports if root is not possible, and a few other misc and related tidies
geoscaling now publishes ROOT_URL, but only when clusters are available, so listening to it instead of other sensors should let callers know when it is safe to do a DNS lookup without causing a failure to be cached; nginx and postgres tidies around the need for sudo (no longer required for nginx)
tidy scanning of classpath entries in catalog, fixing bug where annotations in supplied urls threw silent error and weren't scanned
(includes upgrade to org.reflections library)
Merge pull request #911 from ahgittin/misc

various tidies from the course of working with catalog and opengamma