Python-pachyderm

- Synced with pachyderm core v1.9.8 (PR 159)

- Tweaks to the way `Client`s can be initialized (PR 143, 157)
- Removed support for the deprecated `PACHD_ADDRESS` environment variable
- Removed support for library-specific `PACH_PYTHON_AUTH_TOKEN` environment variable
- Added `Client.new_in_cluster`, which can be used to create a `Client` instance running inside a Pachyderm cluster
- Added `Client.new_from_pachd_address`, which can be used to create a `Client` instance from a pachd address/URL
- Added support for using default system certs
- Added support for client initialization with a transaction ID
- Added support for the enterprise service (PR 157)
- Added support for the auth service (PR 157)
- Added `auth_token` and `transaction_id` properties for better ergonomics (PR 157)
- Renamed `Client.metadata` to `Client._metadata`, since it should be private (PR 157)
- Some changes to `Client.transaction` to be more ergonomic and less redundant with other functionality (PR 157)

- Added support for health (PR 156)
- Added support for debug (PR 155)
- Added full feature parity with PFS, PPS and transactions (PR 152, 151)
- Added `health_records` to `put_file` methods
- Added `input_tree_object_hash` to `finish_commit`
- Added `reverse` to `list_commit` and `list_branch`
- Added `prov` to `subscribe_commit`
- Added `full` to `list_job`
- Added `spec_commit` to `create_pipeline`
- Added `memory_bytes` to `garbage_collect`
- Added `fsck`, `diff_file`, `delete_all_transactions`

- Added support for admin (PR 139)
- Added support for transactions (PR 138)
- Expose `spout` parameter for `create_pipeline` (PR 137)

- Major, backwards-incompatible refactor. The largest change is to move all functionality into a single `Client` class. See this PR for more details: https://github.com/pachyderm/python-pachyderm/pull/129

- Synced with pachyderm core v1.9.7
- Note that this is the last version that will be pinned to pachyderm core versions. Future revisions will rely on semver. See the readme for details.