Bug #2207. Add new build target, advancedsearchjar. This allows the Advanced Search engine to be built as a library for use in other web applications. This is important because LTER is currently using a separate web application for its interface to the Metacat data catalog, so the library allows the search engine to be used both inside and outside Metacat. Eventually LTER would like to fully re-integrate its Metacat interface with the lter skin, so eventually the need for this build target may go away.