* iOS switch from file cache to memory cache and use last_picture_update to update the avatar if needed
* Android switch from file cache to memory cache and use last_picture_update to update the avatar if needed, split function to multiple files and catch potential exceptions
* WIP
* Latest network client
* Init DatabaseHelper and Network
* Add request and query functions
* Fetch posts when push notification is received on Android
Co-authored-by: Elias Nahum <nahumhbl@gmail.com>