Remove now obsolete headers.
Merge branch 'master' of github.com:mavam/vast
Make VAST compile with Clang again.

Relates #47.
Keep compressed logs.
Make type-trait construction obvious.
Set default handler for unhandled messages.

This catch-all handler processes any unhandles messages in the actor base
class for untyped actors. Not only do we like to ensure that an actor's mailbox
doesn't overflow, but we also want to find message protocol errors that
resulted from programming errors.