* Fix possible refering to unallocated memory by using QSharedPointer in
Query::toList
* - Implemented sum field feature
- Fixed SingleField typo
- Added test for sum, and count field feature
- Fixed test case for average field feature
The Query::first fetched all records. Now the limit number is properly
propagated to the SQL generators.
- Optimized limited but not offseted queries in SqliteGenerator
- Implemented limit and offset generation in the MySqlGenerator
- Added test for limited data query
Miklós Márton
Hamed.Masafi