Changes

Summary

1. improve robot tool handling, fix #3090 (commit: 9abd7e2) (details)

Commit 9abd7e2a8a7bc866ff4fcbd084e9b5ac4ede4291 by asiekierka improve robot tool handling, fix #3090 (commit: 9abd7e2)
	common/buildcraft/robotics/boards/BoardRobotMiner.java (diff)
	buildcraft_resources/changelog/7.1.12 (diff)
	common/buildcraft/robotics/boards/BoardRobotGenericBreakBlock.java (diff)
	common/buildcraft/robotics/ai/AIRobotUnload.java (diff)
	common/buildcraft/transport/TransportConstants.java (diff)
	common/buildcraft/robotics/ai/AIRobotBreak.java (diff)