Bug fixes and improvements to ViewProjection

See https://github.com/JasperFx/marten/milestone/22?closed=1 for more information

2.6.0

Lots and lots of bug fixes and new convenience methods for event sourcing projections. See https://github.com/JasperFx/marten/milestone/21?closed=1

2.4.0

• IDocumentSession.Eject()
• Ability to create a session with an existing connection, transaction, or enlist in ambient TransactionScope
• Feature schema extensions

2.3.2 Bug fix release

• Using fields in compiled query objects
• Bug where it was erroneously checking the existence of the event store schema every time
• Permutation bug w/ FK's + subclasses

Marten 2.3.0

Netstandard 2 Support