Interface simplifications.

GetFingerprintsForLabelSet ([]*Fingerprint, error) ->
GetFingerprintsForLabelSet ([]Fingerprint, error)
Interface simplifications.

GetFingerprintsForLabelName ([]*Fingerprint, error) ->
GetFingerprintsForLabelName ([]Fingerprint, error)
Merge pull request #75 from prometheus/refactor/storage/simplifications

Interface simplifications.