Added rectangle and circle draw tools to map

Added ability to remove spatial filter for radius/lat/lon (circle)
searches and to use draw tool to edit these searches. Fixed issue where
dots were not clickable under vector layers following draw tool
searches.
Added spatial search tab (replaces Shapefile tab)

Uses the draw tools on a map to allow users to search based on a
circle, rectangle or polygon.
Increase version number to 0.46