Simple update script for 0.14 -> 0.15

[thislooksfun]

Hello all! I wrote a simple shell script to help with porting mods from 0.14 to 0.15.

To use it, simply download it from here (right-click -> download linked file): https://gist.githubusercontent.com/this ... igrator.sh (v: 1.1.1)
Once you've downloaded it, open your favorite bash client, and run the following:

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chmod +x [drag downloaded file here]
[drag downloaded file here] [drag mod zip/folder here]

E.g., if I downloaded it to my `~/Downloads` folder, and the mod is called `example_mod_1.0.0.zip`, and is located in the standard macOS mods folder, I would run

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chmod +x ~/Downloads/mod_migrator.sh
~/Downloads/mod_migrator.sh ~/Library/Application\ Support/factorio/mods/example_mod_1.0.0.zip

WARNING: This is not a perfect script. There is a pretty decent chance it will make a mistake. For this reason, it will make a backup of the mod before doing any work, and it will log all its changes both to the console, and to a file called `migration_log_[mod name].txt`. Running the script on the same mod more than once might overwrite the backup.

List of changes taken from here: viewtopic.php?f=3&t=44505

Fixes

These will be actively performed

• Remove spacing around '=' in locale files (' = ' -> '=')
• less_then -> less_than
• railpictures() -> rail_pictures()
• underground_belt_distance -> max_underground_distance
• game.get_event_handler -> script.get_event_handler
• game.raise_event -> script.raise_event
• alien-science-pack -> production-science-pack

Warnings

These will just notify you of problem locations.

• Lua.coroutine
• LuaGameScript::evolution_factor
• LuaPlayer::build_from_cursor
• LuaPlayer::rotate_for_build
• LuaSurface::get_tileproperties
• LuaForce::item_resource_statistics
• LuaForce::fluid_resource_statistics

Note: This will not alert you to use of `LuaGameScript::save/load`—which was also removed—since `save` and `load` are widely used keywords and would produce false positives. If people want, I can add them to the warning list though.

If you come across anything you think should be added, please let me know.

[judos]

haha awesome ideaa! Thanks for automating part of the migration process!
I'm just gonna try this out for updating my mods...