* 1. imports incl. google.api_core.datetime_helpers
2. Added logic to def from_json in class DeviceState and DeviceConfig to
convert times to DateTimeWithNanoseconds and binaryData to bytes if env.
vars set

* 1. Changed Device.from_json to support GCP types
for time, binaryData.
2. Changed DeviceState.from_json to handle blank binaryData
3. Changed DeviceConfig.from_json to handle blank binaryData

* Removed extra 'import base64'

* Added note about types of times, binaryData

* Cleaned up formatting

* Further cleanup

* Added copyright info. at top of files

* Not to 'pip install google-api-core'

* Removed instructions for installing
datetime_helpers module. Also now changed 'google.api_core' to 'proto'

* Added "proto.datetime_helpers" to dependencies

* Changed 'google.api_core' to 'proto.'

* Removed call to set 'convert_binarydata_to_bytes'
in Devices.from_json

* Changed README to reflect decision on ONE env. var

* Changed module to import to proto-plus

* Two env. vars -> BINARYDATA_AND_TIME_GOOGLE_FORMAT

* Removed a '.'

* Format improvements for README

* Added note about new env. var in 'Quick Start' sec

* 'config', 'state' None? (i.e. not in fieldMask?)

* Added new @Property's to address DESK-2174

* Made PublicKeyFormat a child class of Enum

* 1. import PublicKeyFormat from .resources
2. New dodict class for providing dot notation for dicts when read.
3. Call to dodict in credentials getter.
4. New functions for converting PublicKeyFormat to/from string.
5. Calls to PublicKeyFormat conversion functions.

* Added note about how to run from source

* Formatting

* More formatting

* Formatting

* Formatting

* Clearer info. on running from source

* 1. Import PublicKeyCredential & DeviceCredential
2. Remove dotdict class.
3. Remove convertCredentialsFormatToString.
4. Set self._credentials=convertCredentialsFormatsToString(credentials)
5. Simplified Device class' credentials getter.
6. Changed Device class attr from 'credentials' to '_credentials'

* Added code to _create_device_body to:
1. Convert DeviceCredential and PublicKeyCredential objects to dicts
2. Convert PublicKeyFormat class to string
This is prior to creating device in registry.

* Add PublicKeyCredential & DeviceCredential classes

* Changed PublicKeyCredential constructor params:
publicKeyFormat -> format
publicKey -> key

* 1. bug: DeviceCredential constructor calls
PublicKeyCredential constructor where params were reversed.
2. Added classmethod convert_credentials_for_create_update.

* 1. Removed unnecessary var from
convertCredentialsFormatToString.
2. Calling convert_credentials_for_create_update
in _prepare_params_body_for_update fcn

* 1. Import DeviceCredential
2. Remove code for converting credentials from _create_device_body and
call DeviceCredential.convert_credentials_for_create_update instead

* 1. Removed the config and state conversion code
from class Device.
2. In Device.from_json returned config as DeviceConfig.from_json() and
state as DeviceState.from_json()
3. In DeviceState replace attr. self._update_time w/ self.updateTime and
self._binary_data w/ self.binaryData
4. Added __getitem__ and get functions.

* In classes PublicKeyCredential & DeviceCredential
added function "get" which does the same thing as __getitem__

* Document changes from last version in UPGRADING.md

* Turned ClearBlade and Google License info. into comments

* Formatting changes

* In 'convert_credentials_for_create_update' check
for expirationTime. If it is datetime convert to ISO string

* Formatting

* Formatting

* Formatting

* Formatting

* Formatting

* Prefixed license info.

* bug: if expirationTime type 'datetime', isoformat
won't work: 'Z' suffix is left off and is needed by CB platform.
Resolved by replacing isoformat with strftime.

found during merging (and because expirationTime is now validated):
DeviceCredential constructor was being called with credential rather
than credential['publicKey'] and credential['expirationTime']. Fixed

* bug: def get_value; if json_data None throws err

* In def convertCredentials... added check for None

Added name attribute to Device class.