Fix error in tiles.lua
Remove unused code
Game protocol 10.20 support

Protocol 10.10 will still be maintained until OTLand IP Changer has been
updated.
Merge pull request #170 from dalkon/master

Proper text messages
Reset script environment if setCallbackId fails
Minor cleanup
Rewrite SHA-1 implementation

There wasn't any license on the old code, and although it was
well-documented it wasn't very efficient either. The new code is also
almost twice as fast.
Use memsize type to access index in string
Fix bug with the new SHA-1 implementation
Optimize SHA-1 to hex string conversion