Support configuring the session ID worker name.

This is to support running behind a mod_ajp proxy in Apache.
Merge pull request #24 from marcoslopes/master

Bump application for release version - 0.13.3
Merge pull request #22 from deverton/session-workername

Support configuring the session ID worker name.
Enhance request correlation filter.

* Set header earlier so it works even in chunked responses.
* Ensure that tracing header is only accepted from local networks.
* Drop timeTaken as Jetty tracks that.
Add clarifying comment.
Merge pull request #25 from deverton/set-header-before-chain

Enhance request correlation filter.
Prepare to release 0.13.4
Merge pull request #26 from deverton/release

Prepare to release 0.13.4
Handle broken X-Forwarded-For case.

When the remote address is invalid in some way, ignore and assume
it's a public address.
Merge pull request #28 from deverton/invalid-remote-address

Handle broken X-Forwarded-For case.
Bump version for release to 0.13.5
Merge pull request #29 from deverton/master

Bump version for release to 0.13.5
Add support for multiple log appenders (as introduced in dropwizard 0.7.0)
 - see https://dropwizard.github.io/dropwizard/manual/core.html#id4
 - old format is still supported for now, but deprecated
Update README to match new log config format
Remove obsolete methods
Extend logging to support filtered appenders
Merge pull request #32 from BMFraser/expand-logging-options

Expand logging options
Bump version for release to 0.13.6
Merge pull request #33 from BMFraser/release

Bump version for release to 0.13.6
Adding Cookie Logging