BuildCraft Builders

Changes:

• Updated to minecraft 1.12.2
• The heat exchange is now a single item, rather than 3. It's still placed in the same way as before though.
  • Existing heat exchangers probably won't load up properly.
  • In addition, its default texture is now closer to iron and quartz pipes than tanks

Bugs fixed:

• Fixed the pipe event bus calling event handlers multiple times (not fully fixed yet though)
• Added the version update JSON link.