Imports of package lease

PathSynopsis
encoding/binaryPackage binary implements simple translation between numbers and byte sequences and encoding and decoding of varints.
errorsPackage errors implements functions to manipulate errors.
github.com/coreos/etcd/lease/leasepbPackage leasepb is a generated protocol buffer package.
github.com/coreos/etcd/mvcc/backend
mathPackage math provides basic constants and mathematical functions.
syncPackage sync provides basic synchronization primitives such as mutual exclusion locks.
timePackage time provides functionality for measuring and displaying time.