Adds global filters as well as custom handling for duplicates and misses

Prepares for #110 Closes #108 and #101

Release notes

{New} Added support for applying filters on the EventMapBuilder level using Where - #111
{New} IEventMap.Handle will now return a boolean to indicate whether or not the event was configured to be handled (accounting for the filters applied) - #111
{Breaking} The contract for a projector that is needed to build an IEventMap have changed. The methods ProjectionModificationHandler, HandleProjectionDeletionsAs and such on EventMapBuilder are now passed to the Build method as an instance of ProjectionMap - #111

liquidprojections / LiquidProjections