Added App Only Authorization client
Added app only initializer
Added basic auth to App Only client
Fixed App Only basic auth
Safer handling of downcasting
Added function for converting dictionary values to Strings in Accounts Client
Cleanup, use let instead of var
Added typed success handlers to Timelines endpoints
Split statuses/oembed into withID andURL
Merge branch 'develop' into typed-success-handlers
Added typed success handlers to Tweets endpoints
Added typed success handlers to Search endpoints
Added typed success handlers to Streaming endpoints
Update demo code
Added typed success handlers to Direct Messages endpoints
Added typed success handlers to Followers endpoints
Added typed success handlers to Users endpoints
Added typed success handlers to Suggested endpoints
Added typed success handlers to Favorites endpoints
Added typed success handlers to Lists endpoints :zzz: