Elevators v1.0.0 (1.7.7.0_02)

Changelog:

• Adds Server-Side elevators into BTA.
• Steel Blocks function as an elevator block, jump on them to go up to the nearest block above you and sneak to go down.
  [There must be a clear path between two different elevator blocks in order for them to function.]

Credit to @UselessBullets for his immense help in creating the initial version (1.0.0)