add headquarter, pawn and view
class diagram
filter world data through view
headquarter spec
add guard
update class diagram
set default to 0 for views
view spec
remove fog functions
refactor matrix to create an array of rows containing fields (x,y oriented)
sinatra application, world action to create and view to see it
controls: create new world
matrix slice
level model
view corresponds to players dropzone
client view correspond to server view
get init responses with world and hq data
rename View.js to Map.js, process initial world data
drag only within viewport, fog background
send view_section_size