Add contribution guidance

Add CONTRIBUTING.md that points to the same document in chef-cookbooks
Add mention of the contribution document in the top of the README.md
Merge pull request #136 from claco/contributing

Merged automatically by jenkins after successful build test
Make token expiration overridable

Required by rcbops-cookbooks/swift-private-cloud#27
Add cron job for token cleanup

closes rcbops-cookbooks/swift-private-cloud#27
Forgot a comma.  Duh.
Merge pull request #137 from rpedde-rcbops/token-cleanup

Merged automatically by jenkins after successful build test
Recreate endpoints when change made from https||http
add new line at end of setup.rb
Merge pull request #138 from jrcloud/de284-keystone-ssl-eps

De284 keystone ssl eps
sepeartion of URIs for SSL working
added logic to roll back to http from https
Merge pull request #139 from jrcloud/de275-ks-ssl-urls

Merged automatically by jenkins after successful build test
DE290 - Resolve resource referencing if apache is not on the keystone server
Merge pull request #140 from odyssey4me/DE290

DE290 - Resolve resource referencing if apache is not on the keystone server
Enable DNS-named public endpoint without host or URI override
Merge pull request #141 from odyssey4me/GH574

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Add missing Listen directive for interna service-api
Add missing vhost tag in ssl.conf
Merge pull request #144 from jrcloud/de295-keystone-vhost

Merged automatically by jenkins after successful build test
Merge pull request #143 from odyssey4me/GH579

Add missing Listen directive for internal service-api