[Anjali] Modified Check.java and used java.nio.io to determine mp3 and wav files
[Anjali] Added the file.sh
[Anjali] Added sound files for testing
[Anjali] Adding Mp3 file for testing.
Merge branch 'master' of github.com:anujku/MSD

Conflicts:
	bin/Checker$PathChecker.class
	bin/Checker$SyntaxCheckerBase.class
	bin/Checker.class
	bin/Test.class
	src/Checker.java