v1.2

Encoding/Decoding data file in/from multiple carriers.

v1.1

• BREAKING CHANGE: Operation is now command line argument instead of flag
  (previously stegify -op encode ... is now stegify encode ...)
• BREAKING CHANGE: Remove file extension inheritance when encoding. Now the file extension of the resulting file when encoding must be specified explicitly in the -result flag.
• Add short, one letter equivalent flags.

v1.0

Api refactoring