Use standard doc dir for installing HTML files

Original nano commit: 4693
http://svn.savannah.gnu.org/viewvc?view=rev&root=nano&revision=4693
Original nano commit message:
	Using standard doc dir for installing html files.  Patch by Mike Frysinger.
Simplify Makefile.am for 'doc' dir

Original nano commit: 4694
http://svn.savannah.gnu.org/viewvc?view=rev&root=nano&revision=4694
Original nano commit message:
	Using 'dist_' prefixes and '+=' appending to produce
	simpler Automake files.  Patch by Mike Frysinger.
Remove 'localedir' from Makefile.am in 'src'

Original nano commit: 4695
http://svn.savannah.gnu.org/viewvc?view=rev&root=nano&revision=4695
Original nano commit message:
	Dropping redundant localedir.  Patch by Mike Frysinger.
Support file globs for rcfile 'include' directive (adapted from nano commit #4696)

Original nano commit: 4696
http://svn.savannah.gnu.org/viewvc?view=rev&root=nano&revision=4696
Original nano commit message:
	 	Supporting globs in include paths.  Patch by Mike Frysinger.