Our files are up to a decade old, and have churned so much, that the initial author of the file no longer has much meaning.
Furthermore, this will encourage developers to post to the developer group, rather than emailing Googlers (usually me) directly.
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.
Updates the BlockFactory main workspace based on the preview block generated from manual construction.
This is a continuation of PR #1216 by @JC-Orozco, rebased on latest develop branch. Bring it latest code up to Google styling and standards.
