Tweaks to sample-config.toml to make sure it works w/ 0.4.0.
Merge pull request #481 from mozilla-services/fix-sample-toml

Tweaks to sample-config.toml to make sure it works w/ 0.4.0.
Change default Dashboard.static_directory value to
`/usr/share/heka/dasher`, and update / clean up changelog.
Merge pull request #482 from mozilla-services/default-dasher-folder

Change default Dashboard.static_directory value to
Prep changelog for next round.
There's gonna be a 0.4.1.
Merge branch 'versions/0.4' into dev
Dev is tracking 0.5, versions/0.4 is tracking 0.4.x.