doc/manual: Refactor, rewrite, improve and update most of the User Manual

* Some TODOs are added as comments which actually require code changes.
  These are details which showed up as incongruences or missing bits
  while writing the documentation for them.

* Some sections are introduced but still waiting to be writen soon:
** Debugging section
** Docker Setup section
** Ansible Setup section
** Troubleshooting (add jenkins red cross button sending kill -9)
** resources.conf attribute list needs to be converted to a table

* Device related setup needs to be updated and extended
* Parametrized scenarios need to be documented
* 4G resources documentation needs to be added.

Change-Id: Ifc2a3c74d45336cc988b76c0ff68a85311e4dd40
diff --git a/doc/manuals/chapters/ansible.adoc b/doc/manuals/chapters/ansible.adoc
new file mode 100644
index 0000000..b672528
--- /dev/null
+++ b/doc/manuals/chapters/ansible.adoc
@@ -0,0 +1,6 @@
+[[ansible]]
+== Ansible Setup
+
+Available in osmocom's osmo-ci.git subdirectory 'ansible/', see there 'gsm-tester/README.md'.
+
+//TODO: Explain more where to find, how to build, how to use.