Change to Twitter permissions we request

Thanks to welcome changes by Twitter to their API, we now no longer need to request as much account access from users entering your giveaway.

Previously, in order for us to verify entries by users on Twitter, we needed numerous access permissions, however Twitter forced the use of full read/write access to user accounts. This meant that when someone linked a Twitter account to our service, a long list of access permissions were requested.

We now only require read access thanks to the changes by Twitter, meaning users will likely be more inclined to link their Twitter accounts moving forward.