Release v1.7.0

• Adds CHANGELOG.
• Adds support for the following apiv3 types
  • broadcastAlert
  • broadcastEmailAttachment
  • divisionContactEmailAddress
  • divisionContactPhoneNumber
  • divisionMemberEmailAddress
  • divisionMemberPhoneNumber
  • eventStatistic
  • statisticAggregate
  • teamMediaGroup
  • teamMedium
  • teamMediumComment
  • userFacebookPage
• Various persistence updates related to the newly added types as well as some
  old types.
• Added new core method file - simliar to exec but with progress callback
• Removed duplicate saveTeamPreferences method.
• Updated some filenames to properly reflect their collection name.
• Documentation!
• Adds missing loadSponsors method.