Moved test configuration files to test/fixtures
Updated embedded documentation and comments
Added tests for ConstantData::Language helper class
[BUNDLER] change active* dependencies to ~> 3.0 to make them less strict
[BUNDLER] updated to adwords-api 0.6.2 and ads-common 0.7.3
[BUNDLER] updated turn gem to ~> 0.9.6
Changed examples permissions: -x
Added support for more Campaign attributes
Added support for Campaign.network_setting attributes
Refactored Campaign attributes (remove duplication)
Added support for Campaign.ad_serving_optimization_status attribute
Refactored Campaign#initialize method
[FIX] budget attributes in Campaign#find
[FIX] bidding_strategy attributes in Campaign#find
Changed Campaign#update to support more attributes
Refactored AdGroup attributes and initialize method
[FIX] AdGroup#bids attributes in find method
Added example: find_ad_group
Added Campaign#update_ad_groups! (unfinished)
Added AdGroup#update (unfinished)