added new classes and removed old classes
Merge branch 'master' of https://github.com/jburnswo/project-tabber.git

Conflicts:
	TabberModelClasses/src/edu/ycp/cs320/tabber/shared/Bass.java
	TabberModelClasses/src/edu/ycp/cs320/tabber/shared/Guitar.java
	TabberModelClasses/src/edu/ycp/cs320/tabber/shared/Instrument.java

	deleted and editted above classes