refined predicate function for ogc proxy, now searches the application hostname
in the url parameter rather than "mapserv"
Added configurations to buildout.cfg, using some of these in config.yaml.in_tmpl
using wmsLayers parameter for external wms layer to differentiate between the display name (appearing the the tree view) and the wms layer name to set up the service request
added few url parameters to configure viewer at startup, exchanged absolute path declarations with relative path declarations throughout the project