Do not test actual timing windows in CI.
Update CHANGELOG
Release version 0.11.0
Merge pull request #136 from rjackson/remove-timing-tests-in-travis

Do not test actual timing windows in CI.
Prevent double initial builds.

Pass a callback function from the Watcher into `Builder::build`. This
callback is called everytime a plan string tree is found. The watcher
uses this to keep track of what directories it is watching.