Comm. Line Parser, Encryption, File I/O

Command Line Parser [beta]
- All functions are implemented, almost all of them are tested
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Encryption [dev]
-Generated UUID of the program
-Made EncryptedFile class and set up all necessary classes
-Partially implemented ECB and CBC block-cypher modes
-Main code is to develop
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File I/O [alpha]
-Implemented all needed code for single-threaded operations
-Asynchronous operations are still in the developing process