Release v3.1.0 [IN PROGRESS] (#88)

* IgnoreWhen for FilterGroup (#87)

* Btc 121 by record type (#89)

* SOQL byRecordType

* byRecordType Test

* byRecordType documentation

* Revert "Btc 121 by record type (#89)"

This reverts commit 5b7a896.

* Code formatting

* Btc 120 aggregate functions (#93)

* AVG, COUNT_DUSTINCT, MIN, MAX, SUM

* Aggregate Functions Unit Test

* SOQL valuesOf fix + aggregate functions

* refactoring

* refactoring

* aggregation methods

* Remove byRecordType

* refactoring

* Aggregation Functions documentation

* documentation + refactoring

* escapeSingleQuotes not needed when binding

* refactoring

* refactoring

* Refactoring

* Refactoring

Author: pgajek2