* Add vault/api to vendor/
* Adds support for sops publish-ing to Vault
* Adds support for publishing secrets (unencrypted) to Vault
* Adds a new EmitAsMap for TreeBanches
* Adds documentation about sops publish-ing to Vault
* Initial integration/functional test for publishing to vault
* Fixes integration tests in travis to not run on PR's (they will now
run on merges into `develop` and `master`)
* Change README.rst and CONTRIBUTING.md to reflect the use of `develop`
as the primary development branch
* kms encryption ctx auto fix
Code to do the migration is still rough and needs clean up and further
testing.
* Added some further polish to enc ctx fix code path
* Attempt to decrypt using other keys before trying enc ctx variations
* just re-encrypt datakey instead of all of the values
* Move KMS enc ctx fix code to new function
* Fix RetrieveLatestVersionFromUpstream with pkg move
* Fixes from code review
* Include err in message displayed to user
* Remove duplicate file.Close() calls in Fix kms func
* move file.Close() to defer
