Creative -> Survival gamemode fix. Oops.
Updated protocol to 1.6.4

Minecarts seem to not work anymore, cannot find a reason for this, packets get sent, minecarts get made, but no dice.
Tiny fix for packet buffers (oops).
Updated Visual Studio solution files to use latest toolset
Merge branch 'master' of https://github.com/Eximius/mineserver
Added casting to attachEntity() leash parameter since bool was not defined