Adding featureOperations when pgQuery fails.
err object should be 1st argument in callbacks.
Phew.  Inflate pbfs pulled out of .mbtiles for browsers that can't handle it (phantomjs webkit), default mapnik xml file for GeoJSON to Image requests.
default carto style is 'default'
Merge pull request #91 from aratcliffe/master

Quote table names
Updating breadcrumbs for visible endpoints.
Fixed empty returnFields error, added OFFSET to query for pagination.
auto-width of right hand side for query page and list pages.
Fixed up args references in table query endpoint