remove the gpg stuff from hgeditor (superseded by the signing extension) remove the gpg stuff from hgeditor, update the comments to make it clear it can be used to show a diff while commiting

adding foo
adding bomb
adding a.c
adding dir/a.o
adding dir/b.o
R a.c
R dir/a.o
R dir/b.o
? .hgignore
a.c: unsupported file type (type is fifo)
R a.c