Replacing all Closure goog. library calls from BlockFactory, with the exception of the ColorPicker and the test for the warning about running without Closure. This includes (almost) all goog.provide and goog.require statements.
Adding BlocklyDevTools.Analytics, an interface for integrating an analytics
library to track basic usage, including:
* navigation.
* saving, importing, and exporting.
* warnings and errors.
* Fix#698 by adjusting the regex to not have \. Still not 100% sure why that was there.
Also replaces bad names on input. There are probably more invalid names but this is
a start.
