Here are some renamings we need to do

medusa-file-information.c contains class MedusaFileAttributes
	we should rename medusa-file-information.c to medusa-file-attributes.c

medusa-file-index.c contains class MedusaFileSystemDB
   	we should rename medusa-file-index.c to medusa-file-attributes-index.c

medusa-uri-list.c -> medusa-uri-index.c

medusa-utils.* -> medusa-utilities.*

move the clause closure stuff into their own file -- they are not the same stuff
as the search uri stuff

medusa-master-db -> medusa-index-controller

medusa-rdb-file -> medusa-database-file ?

change functions named _new that also have a _open to _create 

search_uri_rfc -> Search URI Specification

index-service -> reindexing-service

...erase_constructed_index -> ? erase_files
