Doc updates and remove incorrect enable string
convert 'measure_collector_time' to bool
Add in a squid counter collector
Merge pull request #264 from tomplus/master

'measure_collector_time = False' doesn't work
Display the url we are having issues with
Allow redirection to entirely different servers/ports
Also log host and port for connection requests
Silently ignore missing kitchen imports
PEP8
Don't run userscript test if kitchen isn't avail

This mimics other tests where part of the resources aren't available.