add aggregate to base collection methods
remove comments
validate distinct options

relates to #3
validate count options

relates #3
expose more
docs
use latest driver
docs; updates
use strict
overwrite works with non-empty objects too
docs; update
docs;
docs
mquery.proto.canMerge -> mquery.canMerge
docs; merge/canMerge
docs;
findAndModify; return the query
use canMerge helper
docs;
fix package.json