fixes #18; supports coloring query set services
improved plot preview details organization
fixes #39 - added tooltips to observed properties
minor mods to world wind view
added capability to toggle display mode for observed propreties, in preparation for easier browsing of many SOSs from CSWs
minor fixes
added filter for observed properties; added limited CSW support for IOOS
fixes #41
minor compilation fixes; updated CHANGELOG
fixes #31; fixes to csw discovery and other improvements