Removed "installing nmh" section.  Moved its note about the DIFFERENCES file up next to the other MH discussion.  Changed out-of-date "README" title (should have been "README.history") to "README.about -- about nmh".  After committing, I'll rename the file to README.about inside the CVSROOT.
Removed "installing nmh" section.  Moved its note about the DIFFERENCES file up
next to the other MH discussion.  Changed out-of-date "README" title (should
have been "README.history") to "README.about -- about nmh".  After committing,
I'll rename the file to README.about inside the CVSROOT.

mcr/nmh,dscho/nmh,dscho/nmh,dscho/nmh,dscho/nmh,mcr/nmh