Add a breathless sound for sprint mod

And delete a temporary file
Add a texture for the "acid source bucket"

« bucket_acid »
Adding acid bucket and its texture
- You can now use all items in group:ingot to craft a bucket
- You can now take acid with the bucket
Modifications on moretrees
- Modifications about palm trees' leaves to be non-walkable. All the
  leaves are now walkable except them (aka moretrees:palm_leaves)
A little step backward!
Implementation of megabuild priv in markers mod
- The players owning the precious megabuilder privilege will now be able
  to create, manage, and own an infinite amount of areas by using the
  boundary manager and the markers
Copying code of cactus' check in sprint
- Sprint mod now check if the player is near a cactus. If yes, it hurts
  him. However, the duration between two checking is about 0.1 seconds.
merge server with github
Merge server with github