start converting the quickref to separate files

An experimental plan for easier maintenance. There will be one linear
quickref-NAME.md file per ledger-like, with similar headings and
content across all quickref files. A script will take the sections and
tabulate them nicely to give a layout like the current page. And
perhaps there'll be some javascript to show/hide each format.

Makefile

@@ -1,9 +1,9 @@
 all: html
 
 # generate html from all md files
-html: $(patsubst %.md,%.html,$(wildcard *.md)) Makefile
+html: $(patsubst %.md,%.html,$(wildcard *.md quickref/*.md)) Makefile
 
-PANDOC = pandoc
+PANDOC=pandoc -f markdown+autolink_bare_uris
 
 # generate html from a md file
 %.html: %.md index.tmpl