Add OPNPCU message and its implementation

Close issue #148

Update with 179 revision

Replace SCrypt with BCrypt

SCrypt seems to leave dangling memory. Using the recommended memory cost
parameter of 8 will result in ~100mb of memory lingering in the JVM per
player log-in. Lowering the parameter down to 1 drops it down to 20-35mb
per player, but this still leaves a lot to be desired in comparison to
BCrypt, which doesn't leave a big block of excess memory in the JVM.

Fix issue #61

Replace these values in your personal game.yml to fix issue

Fix order extractDependencies is executed on build task

Update README