Fixes, additional speedhacks, advanced options

Added the ability to revert side/edge textures to default (by sending -1)
Created an Advanced Options section, for controlling new options
Merged a seconds set of player hacks into the client
Added an advanced option to switch between hack modes
Fixed "/" opening a chat window where the caretPos was still 0
Added water level to advanced options
Added sky color to advanced options
Added cloud color to advanced options
Added fog color to advanced options
Added sunlight color to advanced options
Added shadow color to advanced options