Map with location of teachers Added a lot of map specific stuff. Biggest issue is handling lots of markers which can potentailly overlap. There are two external google maps libraries in use to solve this. I hope I have documented everthing properly. I wil

Summary: Necessary changes to reduce scripts, hive queries and frontend to include map of teachers

Test Plan: teacher_country should get populated weekly and teacher-students should display map at the bottom of the page. There are numerous additions here, hence possible bugs are varied

Reviewers: chris, jace

Reviewed By: jace

Differential Revision: http://phabricator.khanacademy.org/D2474