Adding a big number total viz type that is not a timeseries metric

* Adding from __future__ imports

* fixes

* Fixing doctests

* Removing unused ColorFactory (in js now)

* linting

added #GfKDataLab as a Caravel-User

* SqlAlchemy -> SQLAlchemy in README.md

Source: http://www.sqlalchemy.org/

* SqlAlchemy -> SQLAlchemy in tutorial.rst

* Update 4e6a06bad7a8_init.py

* removed comments

* name + extension for generated csv and json files

* write csv index where data is meaningful

* Move window.alert() calls to bootstrap modals. Also log errors that occur to console.

* move misc modal to basic template so it's available on all pages.