mod.  move MySQL query dependence out of time_to_threshold
mod.  move MySQL query dependence out of blocks. PEP-8 compliance.
mod.  move MySQL query dependence out of edit_count/
Add. decorator to handle filtering and normalizing user cohorts
mod.  move MySQL query dependence out of namespace_edits. PEP8.
add. doc strings to query methods
add. pre process decorator to namespace edits.
mod.  rename query_method decorator.  add. post query processing.