Pocket Edition Realms alpha build 2

Alpha Realms build 2 is the second build version released for the Realms phase of v0.15.0 alpha. It was released to primarily fix crashes related to Realms.

Changes

 * Version number now reads "Realms Alpha Build 2" instead of "0.15.0 Alpha Build 2"

Fixes
1 bug fixed

From released versions before v0.15.0
 * – Blocks above pressure plate do not update when block below pressure plate is destroyed