changed theme to sphinx_rtd_theme

Signed-off-by: David Wosnitza <david@druul.in>
diff --git a/user_guide_src/source/index.rst b/user_guide_src/source/index.rst
index d8f60e3..fdb2c8c 100644
--- a/user_guide_src/source/index.rst
+++ b/user_guide_src/source/index.rst
@@ -59,7 +59,7 @@
 .. toctree::
 	:glob:
 	:titlesonly:
-	
+
 	general/index
 
 *****************
@@ -69,7 +69,7 @@
 .. toctree::
 	:glob:
 	:titlesonly:
-	
+
 	libraries/index
 
 ******************
@@ -79,7 +79,7 @@
 .. toctree::
 	:glob:
 	:titlesonly:
-	
+
 	database/index
 
 ****************
@@ -89,7 +89,7 @@
 .. toctree::
 	:glob:
 	:titlesonly:
-	
+
 	helpers/index
 
 ***************************
@@ -99,24 +99,8 @@
 .. toctree::
 	:glob:
 	:titlesonly:
-	
+
 	contributing/index
 	documentation/index
 	DCO
 
-.. toctree::
-	:glob:
-	:titlesonly:
-	:hidden:
-	
-	*
-	overview/index
-	general/requirements
-	general/welcome
-	installation/index
-	general/index
-	libraries/index
-	helpers/index
-	database/index
-	tutorial/index
-	general/credits