Version 0.0.1 (2016-02-01):
* Initial release
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Version 0.0.2 (2016-02-03): Add hoverboard equipment
* add hoverboard equipment
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Version 0.0.3(2016-02-04)
* nerf movement bonus of hoverboard from 100% to 10%(1 to 0.1)
* prevent players from using more than one hoverboard
* update hoverboard equipment size from 1 by 1 to 3 by 2
* Add technology requirement for both copper floor and hoverboard
* Add item group tab MagneticFloor and sort recipe by subgroup
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Version 0.0.4(2016-02-06)
* Add new copper floor level 2 and 3
* Add corresponding icons from copper-floor all the way to level 3
* Add technology upgrade for new copper flooring
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Version 0.0.5(2016-06-16)
* Add automatic navigation via directives and accelerators.
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Version 0.0.6(2016-06-18)
* Eliminate a crash that is caused by player dying.
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Version 0.0.7(2016-06-22)
* Accelerator.png should be accelerator.png
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Version 0.1.0(2016-07-10)
* Accelerator graphic changed to a power symbol button.
* Separate GUI code into its own file.
* Rewrite to account for 0.13 API changes.
* UI change to hoverboard status. Enabled only if the hoverboard is equipped and the user is wearing power armor.
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Version 0.1.1(2016-07-10)
* Fix missing file.
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Version 0.1.2(2016-07-18)
* Hoverboard charges are decreased every second instead of every tick.
* Fix a crash when starting a new game.
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Version 0.1.3(2016-07-20)
* Fix a crash when loading a new game.
* Add the factorio standard library.
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Version 0.1.4(2016-08-14)
* Adjust the ease of mining and laying down copper floor and directives to eliminate annoyance.
* Significantly reduce charge from over forty seconds to only five.
* Add an accumulator to the accelerator charger, which means accelerator tiles required energy.
* Transit from make and makefile to ruby's rake and rakefile build system.
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Version 0.1.5(2016-08-23)
* Rename some prototype files such as tile.lua to tiles.lua, item.lua to items.lua, and so on.
* Upgrade stdlib to 0.6.0
* Reduce the cost of technology research for directives and accelerator. No blue science needed.
* Reorganized code by moving some functionality to the src directory.
* Make all directives entities. Accelerators are now considered directives.
* Migration is now available for transiting from 0.1.3 or 0.1.4 to 0.1.5.
* Update tutorial to account for changes made to the tiles and the entities.
* Rake task symlink now create a symbolic link from inside the dev_mod directory to project directory, eliminating a source of friction in the development process.
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Version 0.1.6
* Upgrade to 0.14.x
* Fix a crash that happens when armor is removed or added from player inventory.
* Add a new shortcut for pausing the hoverboard by pressing enter to replace lost functionality.