Application auto updater

An automatic updater is always an excellent feature to have for clients, so they don't have to keep downloading it from a website or download channels.

Updates are stored on the server encrypted and compressed. When it reaches the client's computer, it will be decrypted with the application secret and decompressed. It will replace the old files, and ZIP them with the extension of "-backup" in case the update failed to install successfully.

All updates are hashed upon upload and verified upon download.