v4.0.7

• Secret-key is now called api-key
• Application version argument is not required anymore in initApp method
• All API methods now async and returns Promise
• All async methods have sync analog with suffix 'Sync'
• Method 'enablePromises' is deleted
• Data and Geo Collections are deleted. Methods which previously were returned collections, now return simple array
• Made class Backendless.Async private
• Added methods for new relation API
• Introduced new classes DataQueryBuilder and LoadRelationsQueryBuilder to help build query parameters
• For paged data, use getGeopointCount, getFileCount and getObjectCount methods to obtain total number of objects satisfying criteria
• Removed restriction for using Backendless.Data.of('Users') notation
• Users.login and Users.getCurrentUser methods now return user data with user-token included
• Method 'sendEmail' returns status of message
• Deleted property Backendless.version