Add docco

README.md

@@ -1,2 +1,40 @@
 # qr_labels
 
+I was packing boxes and nerd-sniped myself by deciding I needed a labelling
+and cataloguing system to help me keep track of what was there.
+
+To do that I needed to print labels for boxes, and figured it might be useful
+if they also had QR codes on them.
+
+I thought there would be a simple online tool to create pages of identical 
+QR labels, but apparently not.
+
+# installing
+
+    go install  code.ppl.town/justin/qr_labels/cmd/qr_labels@latest
+
+or, you can just run it without installing:
+
+    go run code.ppl.town/justin/qr_labels/cmd/qr_labels@latest <arguments>
+
+# Synopsis
+
+Generate a page with 6 labels, where the QR code represents the string
+"hello world" and the printed label is the same,
+
+    qr_labels -code "hello world" -code-is-label -rows 3 -cols 2 -output labels1.pdf
+
+![hello world](labels1.png)
+
+Generate a page with 24 labels, with the code being a URL and the text label 
+being a different string. Adjust the sizes of the code and the font and include
+borders between each label:
+
+    qr_labels -code "https://www.youtube.com/watch?v=dQw4w9WgXcQ" -label 'innocent link' -rows 6 -cols 4 -size 30 -font-style BI -borders -font-size 20 -output labels2.pdf
+
+![hello world](labels2.png)
+
+# Help
+
+Run `qr_labels -help` for all command line parameters.
+