Add empty Lexer class
Merge branch 'master' of github.com:javiersuweijie/ABC-player into ljsharl
added initiatial resource
Added ABC notation word doc
Add Token Types file
Merge pull request #1 from javiersuweijie/ljsharl

Day0
Delete Token Types.docx
Delete ABC notation.docx
merged conflict
Split lexed and tokenisation
Create README.md
Merge branch 'master' of https://github.com/javiersuweijie/ABC-player into javier
added .gitignore to ignore all .DS_Store and binary files
Merge pull request #2 from javiersuweijie/javier

Split lexed and tokenisation
Merge branch 'master' of https://github.com/javiersuweijie/ABC-player into javier
Added tests for end condition for iterator + Added the whole list of TokenTypes
Merge branch 'javier' of https://github.com/javiersuweijie/ABC-player into natalie
Added key mapping and key mapping test