Don't kill the connection just because someone pipelined on a capability pointer that turned out to be null.

Fix bug where capability pointers were corrupted when 'transferred', e.g. using adoptWithCaveats() or truncate().

Add ability to construct a new bootstrap capability for each connecting client based on their authenticated VatId.

- Reduce noise.
- Trace through async callbacks.

Add simple convenience classes for using TwoPartyVatNetwork as client or server, since I find myself rewriting this code over and over.

AnyList::operator== is not inline but was declared as such. Also made formatting of operator declarations consistent.

Add thisCap() method to capability servers which returns a capability to itself. Remove CapabilityServerSet's weak pointers since this supersedes them.

https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=781060

Fix but where interface server's transitive superclass's methods weren't dispatched correctly -- ouch.

Add asGeneric() methods to generic readers, builders, and interfaces which casts them to the same type but with different generic parameters.