flatten transforms for external use render parameters
add getStackBounds and getLayerBounds APIs
add render parameter for converting output images to gray scale
add rotation to layout data
order tile specs by tileId to ensure consistent coordinate mapping
make stack ids sortable
change render-db.properties location for jetty
migrate from Tomcat to Jetty
add tile spec rotation to layout file
update layout data and APIs based upon feedback from Khaled and Eric P., add convertToGray support to buffered image streaming output