Licenses for Alvin Stevens's images.

License for ahs3_concrete.png: GPL

License for ahs3_gnd.png: GPL

License for ahs3_flag_ban.png: GPL

License for ahs3_reg.png: GPL

License for ahs3_wiki.png: GPL

License for ahs3_shflag.png: GPL

License for ahs3_vflag.png: GPL

License for ahs3_stone.png: GPL

License for ahs3_chunk.png: GPL