[TASK] Assignment Complete!

Resolves:

Releases: Ensured that output is in line with str files given.
Added the description field for each node and the exp_exp_node
in: nulnode.cpp nulnode.h nulparser.y

TODO:
[TASK] Assignment Complete!

Resolves:

Releases: Ensured that output is in line with str files given.
Added the description field for each node and the exp_exp_node
in: nulnode.cpp nulnode.h nulparser.y

TODO: