Changelog

Version: 0.18.2
Date: 28. 2. 2020
  Bugfixes:
    - check for missing collision_mask key (new in Factorio 0.18.37) after Wube removed it.

Version: 0.18.1
Date: 28. 2. 2020
  Changes:
    - setting: centre spacing limit increased to 64
    - upon on_chunk_deleted, reapply central rails
    - confirm that EW is default enabled but NS is default disabled.
    - reordered settings for clarity

  Bugfixes:
    - changing the y coord for EW to odd values screws up signal placement but not wiring etc. looks like the y coords need to be divisible by 2 to allow rail grid positioning. Setting now has description. Mod settings applier now rounds up.
    - changing the x coord for NS to odd values screws up signal placement but not wiring etc. looks like the x coords need to be divisible by 2 to allow rail grid positioning. Setting now has description. Mod settings applier now rounds up.

  Defects:
    - landfill if needed doesn't work, yet
    - when the EW lines and NS lines cross, the intersections have messy signalling because the signalling logic doesn't know about the other lines. eg EW doesn't know about NS.
    - if EW line coorinates are too close then their overlaps create "undefined" results, eg signals from one line on rails of another. A warning might help the less observant. (Also impacts NS) This is not the same defect as the NS and EW lines crossing but the results are similar.

  Todo:
    - send event when EW and NS designs completed
    - send other events

Version: 0.18.0
Date: 17. 2. 2020
  Changes:
    - complete engine rewrite for performance and extensibility
    - setting: powerpoles - choice of powerpole. This is to enable future support for detecting modded powerpoles.
    - removed setting: substations
    - thumbnail resized
    - change of license
  Defects:
    - landfill if needed doesn't work, yet
    - line cross-overs have messy signalling
    - not providing a coordinate for EW or NS is currently... less good.
  Todo:
    - emit events before and after chunk generated.
    - emit event after central rails has applied new chunk
    - backport to factorio 0.17.x

Version: 0.0.12
Date: 29. 12. 2019
  Added:
    - setting: enable EW lines
    - setting: EW lines Y coordinates
    - setting: enable NS lines
    - setting: NS lines X coordinates 
  Removed:
    - setting: north/south orientation as well as east/west
    - performance issues, slow code
  Todo:
    - consider crossings and fix up signalling
    - emit event to registered listeners upon after_chunk_cleared. called before rails installed but after decorations, trees cleared.
    - emit event to registered listeners upon after_chunk_modified. called after rails installed.

Version: 0.0.11
Date: 29. 12. 2019
  Added:
    - setting: choice of substation as power pole
    - preliminary support for other power poles
    - setting: north/south orientation as well as east/west
  Bugfixes:
    - minor performance fixes
  Todo:
    - discover other mods at runtime and adjust accordingly. eg dectorio-like mods should be detected automagically.
    - move entire resource patch north or south off the central rails

Version: 0.0.10
Date: 29. 11. 2019
  Added:
    - setting: power pole spacing maximum distance raised to 32. default 30.
    - data: modified big-electric-pole maximum_wire_distance to 32
    - setting: rail signal spacing. allows for configuration of how far apart rail signals are.

Version: 0.0.9
Date: 23. 05. 2019
  Added:
    - setting: land fill generation as option (default:ON)
    - setting: land fill only as needed (default: ON)
    - sample tiles under central rails for the chunk BEFORE asserting more tiles. eg if sand-1 is common then use that instead of grass-1 
    - surface exclusion: factorissimo
    - surface exclusion: space exploration
    - surface exclusion: subterra
  Bugfixes:
    - creating tiles at edges now works better for grass-1 and friends

Version: 0.0.8
Date: 17. 05. 2019
  Added:
    - support for Beautiful Bridge Railway
    - support for Junk Train
    - support for Color Coding
    - setting: center spacing (default: 4)

Version: 0.0.7
Date: 11. 05. 2019
  Added:
    - support for Dectorio
    - support for Concreted Rails

Version: 0.0.6
Date: 09. 05. 2019
  Bugfixes:
    - fixed issue with power poles and odd numbered spacing

Version: 0.0.5
Date: 05. 05. 2019
  Added:
    - setting: configurable power pole spacing
  Bugfixes:
    - fixed northern floor (concrete and landfill under signals)
    - expanded clear zone north and south
    - put central_rail runtime settings into the global to support load/save of worlds *cough*

Version: 0.0.4
Date: 04. 05. 2019
  Added:
    - landfill under rails and signals
    - setting: choice of floor type including none, stone-path, concrete, refined concrete, hazard concrete, refined hazard concrete
    - setting: red/green wiring for long distance circuit signal networks
    - setting: configurable number of rails
    - setting: configurable RHD or LHD
    - setting: nauvis only (this is to vaguely support mods like Space Exploration)

Version: 0.0.3
Date: 25. 04. 2019
  Bugfixes:
    - bug fixes

Version: 0.0.2
Date: 25. 04. 2019
  Added:
    - removed rocks
    - power poles
    - signalling

Version: 0.0.1
Date: 25. 04. 2019
  Added:
    - concrete
    - remove enemies
    - remove trees
    - destructible rails