Criptify 1.0.0

Initial release of the project.

Added

Multiple file encryption and decryption capability
Option to choose whether to generate a new encryption key or use an existing one when encrypting files
More informative error messages for invalid decryption keys

Changed

Updated installation instructions to use _install.bat_ to install required packages

Fixed

Issue where the program would crash if a non-Fernet key was entered during decryption