Docs update (#61)

* Improve sphinx documentation

* update faq formatting

* fix setup doc

* fix docs according to the generated htmls

docs/ahriman.core.sign.rst

@@ -0,0 +1,21 @@
+ahriman.core.sign package
+=========================
+
+Submodules
+----------
+
+ahriman.core.sign.gpg module
+----------------------------
+
+.. automodule:: ahriman.core.sign.gpg
+   :members:
+   :no-undoc-members:
+   :show-inheritance:
+
+Module contents
+---------------
+
+.. automodule:: ahriman.core.sign
+   :members:
+   :no-undoc-members:
+   :show-inheritance: