AtomicCreative field fixes

AtomicCreative should have FBX as an option in ad_formats and TERMINALONESZ as an option in ad servers (#82)

OAuth2!

• Adds support for OAuth2 authentication method
• Adds StrategyTargetingSegment model and support for saving audience segments in strategy model. Note that this is very bare-bones and requires you to send in the data as a dict. Look at the documentation for information about what the POST body should be.
• auth_method parameter in T1 instantiation can be omitted—it will be inferred from the arguments

Unicode Reports, child generators, additional entities

• Reports now properly handle Unicode ( #63, #75 )
• child entities return generator ( #53, #74 )
• Old RMX classes added ( #78 )
• Add target_value_count ( #76 )
• Add Strategy Audience Segments ( #61 )

Saving Users

Fix errors on saving edited users
Add Seat entity

JSON GA Support

This release includes support for the new JSON format, and additional entity fields
Fixes:
#69

Permissions Fix

• Fixes Permission handling (#67)

Fix Exception raising and add Permissions

• Raising exceptions now takes the correct number of arguments
  • Fixes #55
• Adds in user access permissions

Property Check and dmp_enabled field

• Added property check method to enable validation:
  Entity.is_property(prop: str) -> bool: returns True if prop is a field of the entity, else False
  This is useful if you are receiving fields from user input (for instance, an API) and want to validate field existence before saving.
• Added Advertiser.dmp_enabled field

JSON Support, added models, strategy fixes

• JSON parsing (with json=True in T1 instantiation)
  • You shouldn't see impact from this
• StrategyDayPart removal
• ChildPixel removal
• Improved strategy start/end date handling
• Target Dimensions in acceptance tests.

Additional Models and PEP8 compliance

• Added models:
  • Vertical
  • SupplySource
  • AudienceSegment
• PEP8 compliance
• Fixed bug in reports