optional commits
renamed frequency to commit_frequency
added fetch method (for fetching values based on the parameters)
changed exist_param to default
added a function to check if default params would fetch an existing key
removed datetime
added schema_func to dry schema
added fetch func
fix fetch code
added new changes
changed to alchemy_config
added limit offset to geoalchemy
added false condition to geoalchemy main
default to sqlite3 in config file