reading heightmap files according to rows/cols
and calculating respective chunks
calculating chunk crops
generating png chunks
updated client to read col/row info and added partial midmap
updating .gitignore from master
fixed deltaY according to nasa lbl files
replacing png heightmap by nasa's img
reading from nasa img instead of png
generating chunks wih x0y0 in the center again
support for multiple .img files
reading img file directly with node
generating zones
client is loading zone images and getting chunk data from them
mid map is working again
using poi start position
height gets +1 to avoid holes in the map
added poi: lowest point in mars
removed partial map