fix 1476 by loading layer also when server is unrecognized
Merge pull request #1521 from aodn/issue_1476

fix 1476 by loading layer also when server is unrecognized
portal with no db, no filters
refactor layer controller for get filters requests
script to fetch and convert filters to xml

parsing of xml filters from local directory
simplify HostVerifier, also more secure

 * does not allow host because it's in the 'Host' HTTP header
 * faster search via hash map
 * reduce allow hosts to actual hosts
Removed another unused function
Remove splash pages (use landing page in favour)
Removed images and stylesheets not currently in use
Removed references to scanners, and Portal admin pages
Remove Mail and Quartz plugins
Remove more AODAAC code
Remove JS for Menu editing
Remove saved-search controller
remove redundant code for setting openlayers bbox

setting bbox only from metadata record
remove more unneeded js files

 * MenuItemToNodeBuilder
 * MenuTreeLoader
 * ServerNodeLayerDescriptorStore
fix get feature info for non-ncwms layers