BlockEdit quick readme


Keys:
l          Load file
s          Save changes to file
[space]    Place block
q          Scroll up through block types
w          Scroll down through block types
arrow keys Move cursor around
[esc]      Quit

Note: when saving and load, the file's block are merely copied in memory; the file is then closed.  So hitting 's' will not apply changes to the last file opened.  Instead, it will prompt you for a filename to save the change.  Thus, you can save the blocks onscreen to any number of files.  Just try it.
