Statue fixes

This PR adds some fixes to the mineral statues.

1. Adds a cooldown to attacking it with your hand, so it doesn't rapidly spam the rubbing message anymore.

2. Mineral statues starts of unanchored, so you can pull/push them around.
2.A. It takes 4 seconds to wrench and unwrench.

3. Mineral statues can now be deconstructed.
3.A. When unanchored, a welding can be used to deconstruct it. It takes 4 seconds.
3.B. A plasmacutter can deconstruct it, it takes 3 seconds. Regardless if anchored or not.
3.C. A diamond drill can also deconstruct it. It takes .5 seconds. Regardless of it is anchored or not. Using a diamond drill destroys it though and leaves no minerals behind.

4. Mineral Statues now leaves fingerprints when attacked.
The feedback message should be a visible_message(). It also needs "user.do_attack_animation(src)" so the melee attack animation plays.