by_json: Generate circulation policies

* Generate a new circulation policies file: policies.svg
  * Parses Circulation policies
  * Parses Item Types

by_json/templates/gizmo.tmpl

@@ -1 +1 @@
-\"${identifier}\" [shape=${shape} color=\"transparent\" style=filled fillcolor=\"${color}\" label=${label} ${additionals}]
+\"${identifier}\" [shape=${shape} color=\"${border_color:-transparent}\" style=filled fillcolor=\"${color}\" label=${label} ${additionals}]

by_json/templates/label_circulation_policies.tmpl

@@ -0,0 +1,5 @@
+<${name}<br/>${description}<br/>
+Checkout: ${checkout} (duration: ${duration})<br/>
+Requests: ${requests}<br/>
+Policy library level: ${library_level}<br />
+PID: ${pid}>

by_json/templates/label_item_types.tmpl

@@ -0,0 +1 @@
+<${name}<br/>(type: ${itype})<br/>PID: ${pid}>

by_json/templates/label_settings.tmpl

@@ -0,0 +1 @@
+\"Patron type PID: ${pt_pid} | Item type PID: ${it_pid}\"