Add Readfile for Lexer
Merge branch 'master' of https://github.com/javiersuweijie/ABC-player into lijuan
Add empty file 'hi' for testing
Readfile function for Lexer
update LexerFile and FileReader
Merge branch 'master' of github.com:javiersuweijie/ABC-player

Conflicts:
	Token Types.docx
Merge branch 'master' into lijuan
Merge branch 'master' of github.com:javiersuweijie/ABC-player

Conflicts:
	.gitignore