Doc: Updated Document paths

This patch modifes the documentation
in the following ways:

* Contributing, glossary and maintainers
  files, are moved into the
  the documentation directory
* The table of contents in index.rst.in are
  updated accordingly
* Coding_guide, contributing, maintainers and
  readme documetns, are updated accordingly

Change-Id: I40ea47f7f154142f1f02f4492ad53c3533109bb0
Signed-off-by: Galanakis, Minos <minos.galanakis@arm.com>
diff --git a/docs/processes/tfm_design_proposal_process.rst b/docs/processes/tfm_design_proposal_process.rst
index 478220e..1a8ed88 100644
--- a/docs/processes/tfm_design_proposal_process.rst
+++ b/docs/processes/tfm_design_proposal_process.rst
@@ -95,7 +95,7 @@
   !define REJECTED_DIR **docs/design_documents/rejected/**
   !define GERRIT_URL https://review.trustedfirmware.org
   !define GERRIT_LINK [[GERRIT_URL trustedfirmware.org]]
-  !define MAINTAINER_RST_URL https://git.trustedfirmware.org/trusted-firmware-m.git/tree/maintainers.rst
+  !define MAINTAINER_RST_URL https://git.trustedfirmware.org/trusted-firmware-m.git/tree/docs/maintainers.rst
   !define TFM_MAILING_LIST mailto:tf-m@lists.trustedfirmware.org
   !define NO_DECISION **no**
   !define YES_DECISION **yes**