Misc changes

Fixing gnbsim reference
Adding sdcore logo image
separated configuration section

Change-Id: Ib6ec73d8528a3e197c0e19be6a3ee7c1942c6211
diff --git a/index.rst b/index.rst
index 3e68b0b..1c68b43 100644
--- a/index.rst
+++ b/index.rst
@@ -1,3 +1,9 @@
+.. image:: images/sdcore-logo.svg
+   :width: 400px
+   :align: center
+
+
+=====================
 SD-Core Documentation
 =====================
 
@@ -46,6 +52,9 @@
    :glob:
 
    configuration/config.rst
+   configuration/config_rest.rst
+   configuration/config_simapp.rst
+   configuration/application_filtering.rst
    deployment/deployment4G.rst
    deployment/deployment5G.rst
 
@@ -63,7 +72,6 @@
    :hidden:
    :glob:
 
-   developer/guide.rst
    developer/aiab.rst
    developer/gnbsim.rst
    developer/testpod.rst