Initial commit of nasc

Summary: Initial commit of nasc

Test Plan: I installed nasc and opened the program through the budgie menu. Then I typed some sample math and nasc printed the correct output in the side bar.

Reviewers: Triage Team, DataDrake

Reviewed By: Triage Team, DataDrake

Subscribers: DataDrake, alecbcs

Differential Revision: https://dev.solus-project.com/D499