Changes

Notice.c: Add UTF-8 magic byte for OpenSpades (#59)

* Notice.c: Add UTF-8 magic byte for OpenSpades

OpenSpades requires the server to send messages with 0xFF at the beginning
in order for them to be treated as UTF-8, otherwise they are treated as CP437.
Not sending the byte causes unicode text to show up as garbled. Unfortunately
BetterSpades and VOXLAP don't support UTF-8 yet, so this only sends the magic
byte for OpenSpades.
 (commit: bd599c5)

Block.c: Do not allow destroying layer 62

IDK how this went on uncought for so long....
 (commit: 1c81213)

Source: Fix the block checking logic

This lovely issue caused us to have multiple hacks
allowed like destroying below surface or allow fast destroying
of blocks and placing. Just all around broken
 (commit: 464b7e4)