the 'help please' update, see discription.

we need to make gui.py make use of TERRAINMAP_BLOCK_SIZE.  I have it in
the code, but when i change out the res from 8 to 16 on terrain,png, and
adjust TERRAINMAP_BLOCK_SIZE from 8 to 16, the GUI.py does not work as
how it should.  I have set it back to TERRAINMAP_BLOCK_SIZE = 8 for now,
but we are running out of space in textures.png
Updated TODO.md
bedrock bugfix and eat melon

eat melon by avelanarius.
the bedrock under the world was not generating, this fixes it.
Added damage from falling from too high.
Merge commit '9cb225e74fec2ebdee265e8bf0646ff1a0cccd78'