Merge pull request #3 from signifyd/feature/cloudformation-s3

Cloudformation Enhancements
[cloudformation] add wait handle and wait condition to ec2 instance dynamic
[cloudformation] add elb dynamic
[cloudformation] add nexus template
[cloudformation] remove spurious underscore in launch configuration security group name
add some librarian paths to gitignore

(cherry picked from commit b965435a1d0b50432e95d68b19da85f218dd8059)
ignore .kitchen

(cherry picked from commit 42e7d467e6827ad2b323df38d2864b354a000b6b)
remove metadata.json files
loosen papertrail-rsyslog dependency on rsyslog so librarian can resolve
add signifyd_nexus cookbook and dependencies
update signifyd_nexus cookbook
ignore .rb data bag items

this allows us to locally store the cleartext of data bag items as
ruby hashes and only commit the encrypted json generated using
encrypt_data_bag gem
add encrypt_data_bag gem to bundle
add encrypted nexus::auth and ssl::nexus data bag items
expand librarian ignores
rename ssl::nexus databag entries
update signifyd_nexus cookbook
fix ssl::nexus data bag item line endings
update signifyd_nexus to remove htpasswd bits
update signifyd_nexus cookbook