add BuildDataService docs
use different Accept headers for build data files/dirs
return err even if response fails
BuildsService methods for creating/updating builds and tasks
remove build Tries
Merge pull request #10 from sourcegraph/build-data-import

Build data and builds
add Type (public/private/all) field to RepositoryListOptions
UseSSHPrivateKey
add RepositoryListOptions.State field
make the API router take a router, not just a path prefix