Updated documentation, mostly http -> https changes

Also:
- changed http to https in the code
- changed header underlines in the documentation to match the header length
diff --git a/setup.py b/setup.py
index 1ec0268..65fa9da 100755
--- a/setup.py
+++ b/setup.py
@@ -6,7 +6,7 @@
 #  you may not use this file except in compliance with the License.
 #  You may obtain a copy of the License at
 #
-#      http://www.apache.org/licenses/LICENSE-2.0
+#      https://www.apache.org/licenses/LICENSE-2.0
 #
 #  Unless required by applicable law or agreed to in writing, software
 #  distributed under the License is distributed on an "AS IS" BASIS,