Changes from 2.2.0-beta2 to 2.2.0-rc1

*Features:


*Bugs:
- Fixed bug #016394: Dedicated sort fields are broken
- Fixed bug #016436: Warning : Undefined variable: 'DataTypeMapFilter' when making folder
- Fixed bug #015942: warnings in morelikethis
- Fixed bug #016353: Query error: Mixing of GROUP columns (MIN(),MAX(),COUNT(),...) with no GROUP in mysql strict mode
- Fixed bug #015660: Faceting by date syntax issue
