Added letter opener
Merge branch 'add_letter_opener'
Able to get Ads and put Image ads
able to copy texts to images
started copy adgroup
Added some logic to create new adgroup
refreshed token working fine.
remove save after doing update attributes. Not necessary
Merge branch 'add_devise'
Integrated Adwords within Application
Added integration of AdBuilder with Google Adwords image upload. Need test
Removed unusde adwords ads model
adding display ads from Adbuilder is working fine. Needs refactoring
removed adwords library. Will be a class
Merge branch 'AddImagesToAdwordsFromAdBuilder'