[refactored] whitespace and config.set calls
[refactored] whitespace and config.set calls

Summary:
The indentation was too deep, and an object that looked immutable (`defaultConfig`) was being altered.

Karma allows `set` to be called incrementally, so we're doing that instead.

Reviewers: O3 Material JavaScript platform reviewers, #material_motion, O2 Material Motion, featherless

Reviewed By: #material_motion, O2 Material Motion, featherless

Tags: #material_motion

Differential Revision: http://codereview.cc/D2538

material-motion/material-motion-js,material-motion/material-motion-js,material-motion/material-motion-js