Negative integer support

After several hours of trouble shooting, I realized a ‘<‘ was supposed
to be a ‘>’.
Merge branch 'working' of https://github.com/UF-COP-3053-Group/COP-3503-Project into working

Conflicts:
	src/Parser.cpp
Merge branch 'working' of https://github.com/UF-COP-3053-Group/COP-3503-Project into working