Popped values from custom stack-based implementations do not need checking
Added references to pseudocodes
Renamed floodeast2west.lua to floodwesteast.lua
Store single map values, not tables
Changed default n to 1
Added comments
Parses map values to plain tables upon init
Removed clone() method, no longer needed
Sandboxed grid floodfill, because of stack-overflows
Updated  floodfill modules requiring