Shell script fixes to quote "$0" properly in case it includes spaces.
Backslash-escape special characters in Maude "load" commands.

In particular, this is needed when working with files in directories
containing spaces.  Backslash-escaping in this manner is supported by
Maude 2.4 or later, per <http://maude.cs.uiuc.edu/versions/2.4/Changes>.
Oops, fix some mangled quoting that slipped into c9344e5ee40ceb48c500f9b9c200ba2d34720cd0.
Change tabs to spaces, per K project's preferred style.
Merge pull request #657 from liblit/master

Tool fixes to handle spaces in file paths