Updated to v1.6

Certain parts of game-play  a bit  quicker now and when accessing camp / buying items or when placing TNT. 

 I've tweaked the map generation a bit too (when placing the rocks, so things should hopefully be more 'consistent' with about how 'thick' the rock-field in general is per a map). 

     Also made a few parts of the code a little more trimmed / efficient.