Make it so that you can configure the user attributes

In the [docs](http://docs.opscode.com/config_rb_chef_server.html), it says you can set `user['username']`, `user['home']`, and `user['shell']`, but you can't actually do it.
clean targets needed
CHEF-5031 - Add chef_pedant and estatsd Mashes to chef-server.rb
Switch out fastlog for lager; add in additional config for lager
Allow setting the nginx log_dir via attribute

Previously setting this attribute would cause nginx to fail to start
since the log dir referenced in these files would never get created
Merge branch 'mm/move-to-lager'
Merge branch 'tas50-CHEF-5038'
Merge branch 'mattray-readme'
Merge branch 'opscode-jhs/CHEF-5031'
Merge branch 'DrillingInfo-make-user-settings-settable'
Add a file to track MVPs

We're taking MVPs off the wiki and putting them in the individual projects.
We've been a little lackluster lately about picking MVPs for server releases.
If we're not going to continue we should fine a place to memorialize those that
we have already recognized.
Merge pull request #43 from opscode/btm/MVPS

Add a file to track MVPs
Make rabbitmq recipe respect attribute for data dir instead of hardcoded
Pull in latest webui in prep for 11.1 release
Add configuration for turning on ipv6 in nginx
Make it explicit that both ipv6 and ipv4 should be served if ipv6 is on

This is the default in nginx, but there are known linux distros
that fail to respect the default unless it is explicit.
Merge branch 'mm/nginx-ipv6-knob'
Update platform_map with new build matrix label names

We recently updated the following matrix labels for the Jenkins build 
matrix:

build_os -> platform
machine_architecture -> architecture

OSC's release script relies on the values in this JSON file to map a 
directory to a certain platform, platform value and architecture.
Merge branch 'schisamo/platform-map-update'
order labels alphabetically in platform map key naming

This change builds on 3d68a24a which was merged prematurely. Jenkins
creates directory names based on alphabetical order of a build
matrix's label when copying artifacts from another project.