Update README to show how to use encoding

[zero298]

Commit 9dfb3cf added the ability to use different encoding types while translating.

For now the expected encoding options are:

• Padding - The old default style where everything is verbose and enumerated
  • Implementation
  • Documentation
• DotDash - A more graphical representation that returns a string showing on/off signal
  • Implementation
  • Documentation
• RLE - Run-length encoded style where on/off signals are compressed
  • Implementation
  • Documentation