Bonus Blocks 3.1 (BTA 7.2)

Updated to 7.2!

New Block

• Steel Fence (texture by Astronomical360)

Changes:

• Maple has turned into Ironwood due to thorn trees being added
• Removed unneeded mixins
• Bugs with crates/silver beds have been adressed

What's Changed

• Update to 7.2pr2 by @Bigjango13 in #19
• Fix minor bugs by @Bigjango13 in #20
• Fix MP by @Bigjango13 in #21

Full Changelog: 3.0...3.1