modify param name for consistency
change get_color in compute_color
add biome definition
add tilemap definition
add tileset definition and biomize operation
build the new definitions
extract value_with_sea_level from colorize
put the basic color ramp as a static method and transform a color ramp into a tileset
move the random generator so that every operation can have an access to it
Merge branch 'develop' into feature-tmx
add details in tile
add a function that visit the neighbours of a point (4 or 8)
change variable names
add some utility functions to ease planemap use
add invert operator
integrate walk into binarymap
add convenient methods to output maps
add non-const version of visit8neighbours
add a whittaker tileset
add decorate operator