This is a minor release that makes numerous improvements to the Sia renter. The siafile format has been overhauled, and now uses a new encryption algorithm, Threefish. Siafiles can also be bundled into "snapshots" which can be restored at a later time. The renter-host protocol has been completely redesigned to improve performance and enable new functionality via Merkle proofs; in addition, all renter-host communication is now encrypted. This new protocol sets the stage for many exciting new features to come in the v1.4.x release cycle.