Added the AES_plus_Blowfish_in_CBC_mode-main.zip archive and the sour…

…ce code of the Midbar (RTL8720DN Version) (#194)

* Added the AES_plus_Blowfish_in_CBC_mode-main.zip archive

The AES_plus_Blowfish_in_CBC_mode.zip archive contains two sketches that enable you to encrypt your data using a combination of AES and Serpent encryption algorithms in CBC mode. The only difference between them, from the functional point of view, is that one verifies the integrity of the decrypted data (plaintext) while the other doesn't.

* Added the source code of the Midbar (RTL8720DN Version)

Midbar (RTL8720DN Version) is a password and credit card vault that can store sixteen login credentials and ten credit cards in the RTL8720DN's flash, all encrypted by the "AES + Blowfish" encryption algorithm in the cipher block chaining (CBC) mode.