Use bluetooth peripheral role instead of central role (requires krd ^2.3.0 which now acts as a central). Most Android 5+ devices support acting as a peripheral, but some do not (i.e. Nexus 5). This results in more reliable bluetooth performance.

Added kr transfer support to give another Kryptonite key (on another phone) access to some of the servers this key has access to. This greatly simplifies adding Kryptonite to a new phone (and the old phone can remain as a backup). Running kr transfer (which requires krd ^2.3.0) prompts pairing of the old (source) device then the new (destination) device. Then the owner picks which servers to add the new key to.