Remove unnecessary auth from Broadband data sources.

Also add varnish/forever log files to .gitignore.
Merge pull request #389 from NICTA/noAuth

Remove unnecessary auth from Broadband data sources.
flag passing to proxy
cleanup:
Merge pull request #390 from NICTA/varnishCKAN

Varnish tuning for vic
simple flag for 2d startup
Merge pull request #391 from NICTA/2dflag

simple flag for 2d startup
Vic performance improvements.

* Cache GetCapabilities results so opening categories doesn't take as long.
* Remove the "pragma: no-cache" header from proxied CKAN queries.
* Use the proxy for legend images so that they are cached.
Merge pull request #392 from NICTA/vicPerformance

Vic performance improvements.