Some comments and formatting cleanup

setup.cfg

+# Generally describe the project
 [metadata]
 name = Secure Access Token Authorizer
 version = attr: _secureaccesstokenauthorizer.__version__
@@ -18,9 +19,13 @@ author-email = support@privatestorage.io
 platform = POSIX
 
 [options]
-package_dir=
+# All of the source is in the src directory.  The weird syntax is defining a
+# dict with a key "" and a value "src".
+package_dir =
     =src
-packages=find:
+# Use the automatic finder to pick up packages.  It is configured below.
+packages =
+    find:
 
 [options.packages.find]
-where=src
+where = src