Updated the solutions file for the affine transformations lab.
Merge branch 'develop' of https://github.com/byuimpact/numerical_computing into develop
Merge pull request #329 from abefrandsen/student_edits

Student edits
add an explanation of nodes
Merge pull request #330 from ayr0/nodes

add an explanation of nodes
Took out duplicate pictue
Merge pull request #331 from AZaitzeff/bacon

Took out duplicate pictue
Merge branch 'develop' of https://github.com/byuimpact/numerical_computing into develop
Made changes to the LU lab.
Minor edits as suggested by the students.