Add skip_cleanup to travis deploys

This only broke github releases on OSX, for some reason, but the docs
indicate it should always be on.

Update travis releases key

Don't create the version dir before downloading data to a tmp location

This was causing the same problem as #12, because the empty version dir was
left around after a failure.

bump version

Bump version number

Bump version to 0.4.4

bump version

<excessive profanity>

bump version

Make sure we copy the syncMarker when reading it

Otherwise, the syncMarker will point to the reusable array that we use for
reading.