Use possessive form of "human"

The current GameMode belongs to the human.
Update ADVENTURE description

Adventure mode only disallows the breaking of blocks without the correct tools (http://minecraft.gamepedia.com/Adventure).  This will have to soon be updated for 1.8, since no blocks will be able to be placed/destroyed, regardless of the tool.
Merge #80, #81

Thanks @Bionicrm

commit 6562785e055070024c165cbc2b6f71709b00aff7
Author: T.J. M
Date:   2014-03-30 04:11:20 -0400

Update ADVENTURE description

Adventure mode only disallows the breaking of blocks without the correct tools (http://minecraft.gamepedia.com/Adventure).  This will have to soon be updated for 1.8, since no blocks will be able to be placed/destroyed, regardless of the tool.

commit c36957b730c67e74500de5541ea0eec38e359a71
Author: T.J. M
Date:   2014-03-30 03:47:11 -0400

Use possessive form of "human"

The current GameMode belongs to the human.