Fix to prep.rst doc for Handles support
Fix to prep.rst doc for Handles support

Edited sentence under Architecture and Components section to make more
sense now that Handles are supported. Also moved a diagram on the page
to lessen confusion over its placement.

jacksonokuhn/dataverse,JayanthyChengan/dataverse,jacksonokuhn/dataverse,JayanthyChengan/dataverse,JayanthyChengan/dataverse,jacksonokuhn/dataverse,jacksonokuhn/dataverse,jacksonokuhn/dataverse,jacksonokuhn/dataverse,jacksonokuhn/dataverse,JayanthyChengan/dataverse,jacksonokuhn/dataverse,JayanthyChengan/dataverse,JayanthyChengan/dataverse,JayanthyChengan/dataverse,JayanthyChengan/dataverse