mod. Set dev status to "Development Status :: 4 - Beta"
add. method sub_tokens to substitute database and table names in query strings.
mod. ignore json and csv
mod. replace database (e.g. %(project)s) and table format elements in query_store entries with tokens to replaced by sub_tokens method.
mod. ensure escape_string in escape_var escapes a string without any whitespace.
fix. del connectons, use sub_tokens where instance and table names need to be substituted.  Remove stripping and splitting of SQL, unnecessary.
fix. secured rev_count_query and added test.
fix. secured live_account_query and added test.
fix.  secure remainder of queries.  Pass params to execute and utilize escape_var where necessary.
add. tests for rev_query and rev_len_query.
add. more robust exception handling.
fix. cleanup - missing values, exceptions, query formatting
rm. execute_SQL method from Connector.  Depracated.
rm. is_instance call, add execption handling.
rm. refs to 'slave' connection.  No connection keys should be hard-coded.
rm. lingering ref to execute_SQL.  Cleanup code.
mod. Make all cohort id requests via query sub-package.
fix. secure user queries.
fix. error importing UserMetricError, use base Exception class.
mod. use http://noc.wikimedia.org/conf/ dblists to build project : db map.