Compile FileReader and Lexer are together
Header Lexer
update header Lexer
Merge pull request #6 from javiersuweijie/natalie

added edited NoteParser, NoteParserTest, and edited Note object to have ...
Merge pull request #7 from javiersuweijie/natalie

changed parserNoteTest
Lexer can split into tokens belonging to music body [not header]
Code used to check validity of regex expressions for Lexer [only for body]
Merge branch 'master' of github.com:javiersuweijie/ABC-player into sharlene
Merge pull request #8 from javiersuweijie/lijuan

Modify ReadFile to split header into tokens and remove unneeded files
Resolve conflicts between Lijuan's and Sharlene's ReadFile.java

Conflicts:
	src/Lexer/ReadFile.java
Implemeted toPitch mehtod on Note to get Pitch object from Note.

Note is no longer a subclass of Pitch
Cleaned up parser, added more test cases
added comment for noteparser and updated get note length method
updated note parser and added comments