Misc changes we'll have to do sooner or later

[PrOF-kk]

A collection of smaller misc stuff to do I've had in a txt file on my desktop for some time

• "new" is a reserved keyword in newer GM:S versions
  

  Gang-Garrison-2/Source/gg2/Scripts/Maps/Builder/showPropertyMenu.gml

  Line 65 in 5469604

  new = get_string("Value for " + prop + ":", "")

• Missing comma
  

  Gang-Garrison-2/Source/gg2/Objects/InGameElements/Builder.events/Step.xml

  Line 325 in 5469604

  var entity, entity2 xscale, yscale, _x, _y;

• "method" is a reserved keyword in newer GM:S versions
  

  Gang-Garrison-2/Source/gg2/Scripts/Faucet HTTP/__http_prepare_request.gml

  Line 32 in 5469604

  method = argument1;

• We don't include any LICENSE file for any extension, check if that is correct or we forgot
• Mention the in-game file rotation chooser in the READMEs
• Add updating the copyright year to the release checklist, copy the checklist to the Github Wiki

[Medo42]

Missing comma

How does that even parse right now? GM8 is a marvel.