diff for gEDA PCB export in fped

I have

1) sorted out the tabbing

2) simplified > 1 element export by exporting elements in a layout (.pcb)

3) documented incompatibilities in the README

4) done it as a diff against origin master

let me know if you need anything else done

Cheers.

Erich

From dae69d9a63071a15c213c72e70b86fe963a67dd4 Mon Sep 17 00:00:00 2001
From: erich_heinzle <a1039181@gmail.com>
Date: Sun, 22 Jan 2017 23:48:57 +1030
Subject: [PATCH] support for export to gEDA format of single and multiple
 footprints in a .pcb layout

README

@@ -81,6 +81,19 @@ drawing reduces the risk of mistakes. Visualizing the construction
 process and verificative measurements helps efficient and accurate
 review.
 
+Leveraging the work already done, and growing the intellectual commons
+of available footprints has motivated the addition of an export to gEDA
+pcb format option. Single or multiple footprints are exported in a
+gEDA PCB layout (.pcb) file. A select all command can be used, followed
+by a "disperse elements" command, to allow viewing of multiple elements
+in the gEDA layout editor. An element can then be selected, cut to
+buffer, and exported to a footprint (.fp) file with the usual menu
+commands.
+
+gEDA PCB format footprints are exported in centimil units. Pads with
+offset centre holes are not faithfully reproduced; the pad is exported
+with minimum dimensions and centred on the hole. Trapezoidal and
+roundrect pads are not supported in gEDA.
 
 Footprint definition file format
 --------------------------------