* Simple entity removal in Builders
Performance could be improved
* Removed rocks parameter
The increased radius caused simple-entity to work
* Added another way to remove units that should be more efficient
* Changed find_entities to use area instead of radius
* removed remove_units function
* changed function name from names to name
* added table.shallow_copy
* reworked 'remove_*' builders
* used remove_* builders for existing maps
* update .luacheckrc
* Added links to documentation for each public function
* Added links for new functions
You add a new surface by calling the get_surfaces() method in generate.lua
And then inserting a new value in the key, value format: [surface_name] = shape
Example
`local Generate = require 'map_gen.shared.generate'
game.create_surface('snake')
Generate.get_surfaces()['snake'] = b.rectangle(45, 4)
* Remove math and table as globals.
Create exceptions for table.lua and math.lua to modify respective globals and add returns for respective globals.
* Fix lint errors from table and math
