Add make automation to re-generate man page [ci skip]

This also updates man page with latest changes

man/Makefile

@@ -0,0 +1,11 @@
+all: prepare generate
+
+prepare:
+	gem install specific_install
+	gem specific_install -l smira/ronn
+
+generate:
+	cd .. && gom build  -o man/gen man/gen.go
+	./gen
+
+.PHONY: prepare generate

man/aptly.1

@@ -1712,6 +1712,10 @@ Options:
 render graph to specified format (png, svg, pdf, etc\.)
 .
 .TP
+\-\fBlayout\fR=horizontal
+create a more \(cqvertical\(cq or a more \(cqhorizontal\(cq graph layout
+.
+.TP
 \-\fBoutput\fR=
 specify output filename, default is to open result in viewer
 .
@@ -1860,5 +1864,11 @@ Geoffrey Thomas (https://github\.com/geofft)
 .IP "\[ci]" 4
 Oliver Sauder (https://github\.com/sliverc)
 .
+.IP "\[ci]" 4
+Harald Sitter (https://github\.com/apachelogger)
+.
+.IP "\[ci]" 4
+Johannes Layher (https://github\.com/jola5)
+.
 .IP "" 0