v0.3.0

features

• growth calculation
• top n by group
• sort
• order
• properties
• clickhouse-rs upgraded to 0.1.5 for connection pool

maintenance/perf

• refactor sql to have a primary aggregation, and optional wrappers for calculation/filtering
• where clause in fact table for cuts, to improve query times from 20-100x.
• clickhouse uses newly pub SqlType for reflection, instead of string
• fix bug in getting cube's table name
• use trait object for databases