refactor to use D1RestServlet and D1ResourceHandler for the D1 rest interface
make RestServlet and ResourceHandler extendible for D1 CN and MN handlers
implemented describeObject
Merging in REST interface implementation that was created by Serhan Akin. Main change isa refactored MetaCatServlet.java class, in which all of the handle* methods were movedinto a separate MetacatHandler.java class. This allows both the standard MetaCatServlet...