Refactored ouicards and removed all none core logic from ouicards.js
Update README
Refactor Example/example.js to use the new ouicards.js code
Refactor ouicards.js to abstract logic and allow it to ONLY handle flashcard specific logic
Add font-icon to Example/
Refactor ouicards.js to use The Leitner System
Update Example files, including layout and behavior
Fix implementation bug and better error handling for both ouicards.js and our example