Removed tree test code

Removed extraneous code to make room for futre expansion.
Created linked list of strings.

Created a StringList class which contains a linked list of strings.

Added the StringList to the makefile.

Added test code to the main function to test the StringList.
Created show class

Created a show class that contains all the data for a TV show.

Created test code for the new show class.
Added data file

Added the data file to the project.

Removed the data file from the .gitignore file.
Merge branch 'develop' into input
Fixed show class

Changed the show class actor list from being a linked list to being
an array.
Updated BST

Updated the BST to hold Show objects.
Added year parsing.
Merge branch 'input' into develop
Finished all functions.

Finished all the major functions. Now the tree can be searched by
title, actor, and/or year.
Merge branch 'develop'