added transmitters
qraat python module tree
seperate receiver sites from other sites
est table: removed datetime and timezone, use timestamp field.  Changed txID to depID
position table: added lat, long fields.  Will be calculated by position estimator at insertion, for use in mapping with google API and KML format
interval_cache: changed txid to depid
naming consistancy: all (ID) fields captialized, all foriegn key-like id fields named tablenameID, all other table and field names lowercase
added transmitter tables
added some todos
reclassified track table as user editable, added foriegn key constrant, and changed engine to InnoDB