Update README and setup.cfg, initial version of usage guide

* Set setup.cfg URL to the (future) documentation link
* Remove Python 3.3 and 3.4 support, leave only 3.5
* Update README with actual information
* Include README in index.rst as an introduction
* Very basic usage guide, mostly links to Tempest docs
* Switch links to HTTPS

Depends-On: If130b765604d606420a4877a548e82d311ef7b9b
Change-Id: Idacf84322773e40eaaa6346dc062291578876a1d
diff --git a/setup.cfg b/setup.cfg
index bfcddfc..64770b6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,11 +1,11 @@
 [metadata]
 name = ironic-tempest-plugin
-summary = Tempest plugin for ironic
+summary = Tempest plugin for ironic and ironic-inspector
 description-file =
     README.rst
 author = OpenStack
 author-email = openstack-dev@lists.openstack.org
-home-page = http://www.openstack.org/
+home-page = https://docs.openstack.org/ironic-tempest-plugin
 classifier =
     Environment :: OpenStack
     Intended Audience :: Information Technology
@@ -16,8 +16,7 @@
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.3
-    Programming Language :: Python :: 3.4
+    Programming Language :: Python :: 3.5
 
 [files]
 packages =