non admin users are only given the code name of the observatory they represent
cleaned up code, fixed observatory id
removed file that is no longer used
removed file that is no longer used
removed reference to Observatory and change observatory to use index.php
fixed code and changed mount path
Add sqlite, mysql drop_tables scripts
DatabaseInstaller class, with sqlite and mysql implementations
Updated setup_database script to support recreating schema without dropping, reference load_bns script for data loading
Added current user default_observatory_id to observation navigation link.
Merged conflicts.