The purpose of this library is to provide:
* An extensible framework that will support robust spatial indexing methods.
* Support for sophisticated spatial queries. Range, point location, nearest
  neighbor and k-nearest neighbor as well as parametric queries (defined by
  spatial constraints) should be easy to deploy and run.
* Easy to use interfaces for inserting, deleting and updating information.
* Wide variety of customization capabilities. Basic index and storage
  characteristics like the page size, node capacity, minimum fan-out, splitting
  algorithm, etc. should be easy to customize.
* Index persistence. Internal memory and external memory structures should be
  supported. Clustered and non-clustered indices should be easy to be persisted.