Minor changes to problems in Getting Started Lab.
Merge pull request #300 from abefrandsen/vol_1_edits

Minor changes to problems in Getting Started Lab.
Made minor edits to the first labs of vol's 1 and 2.
Merge branch 'develop' into vol_1_edits
Minor edits found by the students.
Merge pull request #302 from abefrandsen/vol_1_edits

Vol 1 edits
Merge branch 'master' into numpy