revision of SECoP documentation

- created secop_v2017-09-14.rst, based on the GoogleDocs
  SECoP Preliminary V2016-11-30 (rc 2)
- this Document is supposed to contain the full SECoP standard
- created SECoP issues
- moved everything else to "outdated" (kept for reference)

Change-Id: I87d69d1846fc4ed55f1c78b22fd4650d8550152b
Reviewed-on: https://forge.frm2.tum.de/review/16573
Reviewed-by: Enrico Faulhaber <enrico.faulhaber@frm2.tum.de>
Tested-by: JenkinsCodeReview <bjoern_pedersen@frm2.tum.de>

doc/source/protocol/outdated.rst

@@ -0,0 +1,20 @@
+Outdated documentation
+======================
+
+.. toctree::
+   :maxdepth: 2
+
+   messages
+   descprop
+   hierarchy
+   descjson
+   timeformat
+   modsubset
+   heartbeat
+   jsonstruct
+   datatypes
+   commands
+   todo
+   notes
+
+