Tweak docs

CONTRIBUTING.md

 
 Code that is committed to the master branch should work with both Debian 8 "Jessie" and Ubuntu 16.04 LTS "Xenial".
 
-## Development environment
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-You'll want to set up a [local development environment](https://github.com/sovereign/sovereign/wiki/Development-Environment) so that you don't have to test on a remote server.
-
 ## Module design principles
 
 Sovereign is an Ansible playbook that uses the modules in this repository to configure a server. Modules should conform to the following design principles.
 
 A module should be designed and implemented to run as quickly as possible in order to minimize the time to run an entire playbook or even the role itself. A small performance penalty here and a small penalty there eventually adds to a very slow deployment system. Performance is important.
 
-### Tests
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-A module should have tests. TBD: more about this and what the expectation is.
-
 ### Design document
 
 A module should have a design description explaining the approach to implementing a service and what tradeoffs were made when choosing the design that was implemented. Do not leave this for comments in a pull request as we want this close to the code for the sake of future maintainers.

README.md

 ----------------
 
 1.  A VPS (or bare-metal server if you wanna ball hard). My VPS is hosted at [Linode](http://www.linode.com/?r=45405878277aa04ee1f1d21394285da6b43f963b). You’ll probably want at least 512 MB of RAM between Apache, Solr, and PostgreSQL. Mine has 1024.
-2.  [64-bit Debian 8.3](http://www.debian.org/) or an equivalent Linux distribution. (You can use whatever distro you want, but deviating from Debian will require more tweaks to the playbooks. See Ansible’s different [packaging](http://docs.ansible.com/ansible/list_of_packaging_modules.html) modules.)
+2.  [64-bit Debian 9](http://www.debian.org/). (You can use whatever distro you want, but deviating from Debian will require more tweaks to the playbooks. See Ansible’s different [packaging](http://docs.ansible.com/ansible/list_of_packaging_modules.html) modules.)
 
 You do not need to acquire an SSL certificate.  The SSL certificates you need will be obtained from [Let's Encrypt](https://letsencrypt.org/) automatically when you deploy your server.
 
 
 ### 6. Run the Ansible Playbooks
 
-First, make sure you’ve [got Ansible 1.9.3+ installed](http://docs.ansible.com/intro_installation.html#getting-ansible).
+First, make sure you’ve [got Ansible installed](http://docs.ansible.com/intro_installation.html#getting-ansible).
 
 To run the whole dang thing:
 
 	ssh deploy@example.com -L 6643:localhost:6643
 
 Then proceed to http://localhost:6643 in your web browser.
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-Similarly, to access the server monitoring page, use another SSH tunnel:
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-    ssh deploy@example.com -L 2812:localhost:2812
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-Again proceeding to http://localhost:2812 in your web browser.
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-How To Use Your New Personal Cloud
-----------------------------------
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-We’re collecting known-good client setups [on our wiki](https://github.com/sovereign/sovereign/wiki/Usage).
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-Troubleshooting
----------------
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-If you run into an errors, please check the [wiki page](https://github.com/sovereign/sovereign/wiki/Troubleshooting). If the problem you encountered, is not listed, please go ahead and [create an issue](https://github.com/sovereign/sovereign/issues/new). If you already have a bugfix and/or workaround, just put them in the issue and the wiki page.
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-IRC
-===
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-Ask questions and provide feedback in `#sovereign` on [Freenode](http://freenode.net).