docs/codesnippets: Link to source tree on github

docs/codesnippets.rst

@@ -14,6 +14,9 @@ Here we present code examples that use the :ref:`python-module-instaloader` for
 more advanced Instagram downloading or metadata mining than what is possible
 with the Instaloader command line interface.
 
+The scripts presented here can be downloaded from our source tree:
+`instaloader/docs/codesnippets/ <https://github.com/instaloader/instaloader/tree/master/docs/codesnippets>`__
+
 .. For each code snippet:
    - title
    - brief description of what it does / motivation / how it works

docs/codesnippets/README.md

@@ -0,0 +1,4 @@
+# Advanced Instaloader Examples
+
+This directory contains the scripts that are presented at:
+https://instaloader.github.io/codesnippets.html