A first version of the pandas lab
Zach's draft of the pandas lab.
Added plotting file along with the generated pdfs. Some Revisions to the
pandas lab.
Expanded the SQL section of pandas lab.
Changed format silghtly for displaying the names of data types in pandas.
More additions and refinements to the pandas lab.
More revisions to pandas lab.
Final round of revisions to the lab.
Merge pull request #621 from abefrandsen/new_pandas

Intro to pandas lab.