Minor change to first numpy lab.
Fixed example code in first Numpy Arrays lab.
Merge branch 'develop' into student_edits
A couple of student edits.
Merge branch 'develop' into student_edits
Fixed more mistakes found by students in Vol 1 lab 3.
Fixed small typo in matplotlib lab.
Merge branch 'develop' into student_edits
Merge branch 'develop' of https://github.com/byuimpact/numerical_computing into student_edits
Various sundry edits to volume 1 labs, as found by the students.
Added missing words to the Affine Transformation lab.
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