Content: State of the Union queries

Summary:
This query was created to gather insight about how students are submitting problems either via the new Learning Dashboard or via the existing Tutorial view.  This insight was presented in the "Content: State of the Union" document created by Matt Wahl.

Further analysis of this data can be found in https://docs.google.com/a/khanacademy.org/spreadsheet/ccc?key=0Al7ZAdYc_lEVdDE4RUlXbXpUNDNaUVVoNDZyRy1vZmc&usp=drive_web#gid=4

For now, there is no plan for these to become production queries.  I'm just checking them in for posterity.

Test Plan: Copy+paste the queries into hive

Reviewers: eliana

Reviewed By: eliana

CC: jace, tom, tony

Differential Revision: http://phabricator.khanacademy.org/D5428