Rewrite cmd/e

Using the -a (--alternate-editor) option failed, so I rewrote this
script close to what it was in XEmacs times. Now .gitconfig prefers
~/cmd/e over gvim -f.

modified:   .gitconfig
modified:   cmd/e
Update apt-clone state

modified:   cesar-u64-dev-Ubuntu-trusty.apt-clone.tar.gz