Labpack

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* [FEATURE ADDED] compilers.git package with merge_diff method
* [FEATURE ADDED] compilers.json package with merge_json method
* [FEATURE ADDED] compilers.yaml package with merge_yaml method
* [UPDATE] added support for list records to save_settings
* [DEPRECATED] removed error throwing from ingest_environ with model arg

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* [FEATURE ADDED] SQLSession class added to handle sql database connections
* [FEATURE ADDED] SQLTable class added to manage sql table records
* [FEATURE ADDED] databases.google package added to support Datastore
* [FEATURE ADDED] DatastoreTable class added to manage Google Datastore
* [FEATURE ADDED] r53Client class added to manage domains on AWS
* [BUG FIX] removed spaces from eligible table names in sqlClient

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* [BUG FIX] changed yaml.load to yaml.full_load
* [BUG FIX] added check for heroku version in herokuClient
* [BUG FIX] updated container registry check method in herokuClient

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* [UPDATE] added optional argument to disable validation in labDT.fromPattern
* [BUG FIX] updated heroku docker deployment plugin verification
* [BUG FIX] order_criteria validation in sqlClient.list
* [BUG FIX] added container release operation to herokuClient.deploy_docker

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* [UPDATE] changed instance tag name LoginName to UserName in sshClient
* [UPDATE] dockerClient and herokuClient defaults and documentation
* [BUG FIX] handled no users in response from find API in findClient
* [BUG FIX] corrected list declarations in ec2Client.list_subnets & list_security_groups
* [BUG FIX] added 17 character long id validation to ec2-rules.json

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* [BUG FIX] removal of lists and items in list fields in sqlClient