DOC: Moving user guide to its own directory to help navigation

Author: datapythonista

doc/source/index.rst.template

@@ -131,24 +131,7 @@ See the package overview for more detail about what's in the library.
     cookbook
     dsintro
     basics
-    text
-    options
-    indexing
-    advanced
-    computation
-    missing_data
-    groupby
-    merging
-    reshaping
-    timeseries
-    timedeltas
-    categorical
-    visualization
-    style
-    io
-    enhancingperf
-    sparse
-    gotchas
+    user_guide/index
     r_interface
     ecosystem
     comparison_with_r

doc/source/advanced.rst renamed to doc/source/user_guide/advanced.rst

@@ -0,0 +1,29 @@
+{{ header }}
+
+.. _user_guide:
+
+==========
+User Guide
+==========
+
+..toctree::
+   :maxdepth: 2
+
+   io
+   indexing
+   advanced
+   merging
+   reshaping
+   text
+   missing_data
+   categorical
+   visualization
+   computation
+   groupby
+   timeseries
+   timedeltas
+   style
+   options
+   enhancingperf
+   sparse
+   gotchas