* Update sample project to dotnetcore3.1
* Use Sqlite in sample project to run it everywhere
* Fix: Filter with escaped comma
* Fix: Filter "null" does not work with Contains or StartsWith
* Code cleanup: Adjust namespaces, adjust usings
SieveProcessor is modified to pass propertyInfo to OrderByDynamic to avoid reattainment of propertyInfo required in Expression.MakeMemberAccess.
SieveProcessor is modified to be able to handle possible multiple incompatible customMethods via AggregateException.
Corresponding interfaces are generated for entities with related inheritance.
ApplicationSieveProcessor is modified to include interface members.
SieveCustomFilterMethods and SieveCustomSortMethod are modified to include interface related custom method modifications.
Interface accessed unit tests are added.
