when doing Entity.addChild, create a copy of the spec and set the parent *there* if needed, so that config is inherited even when running `AbstractEntity.init()`
support ProxySslConfig being set from map, so we can configure nginx via yaml
fix typos and warnings
REST API support for setting multiple sensors or config with a map
BROOKLYN-95 - make nginx re-configurable, to switch to ssl while live

a bit sloppy, running connectSensors multiple times, but it works.
better would be a restart which does install again, or to facilitate starting at the same VM.
add nginx yaml sample, and prevent multiple feeds getting added
ensure fields are copied when cloning a spec
fix the rat
This closes #373