Support for whether time_column exists in dimensions or not
Add & apply TimeUnitToTableSuffixHash
Dont index :t if not exist
Explain a situation that statistics without time_column
Add "In Mongodb, why use MapReduce instead of Aggregation?".QA
Sort insert values in test
cron.output should is a Enumerable
Add CodeGistMongoid.model & prepare data
Implement Timely#multiple_dimensions_output_without_time_column
Fix creating stat table in different situations
Add test_multiple_dimensions_output_without_time_column