Develop

* Supports all video formats Matlab supports
* Fixed major bug with LSB decoding
* Added message generator that returns extracts of Sherlock Holmes
* Added steganography_init() which initializes all steganography functions
* Added steganography_statistics() which calculates and displays important statistics at the end of the steganography funcitons
* All steganography functions now calculate how much data they can try to encode
* Moved test files into separate test folder
* Added support for calling Python functions
* Added Python function to accurately compare similarity of two strings
* Added Python function to perform basic spell checking