updated .gitignore
functions return bool instead of bool, removed deleteLastNode function, cleaned up remaining functions
switched Makefile and source files out of testing and connected linkedlist back to main program
merged changes made to linkedlist into master
removed unnecessary hashset functions, cleaned up hashset implementation
switched Makefile and source out of testing and connected hashset back to main program
merged changes to linkedlist and hashset into dictionary branch
set up testing for dictionary