831 - Width and height account for gutter

Close #831.
More accurate testing
Adding test messages and removing unneeded tests
Using closeTo
Merge branch 'master' into 831-gutterCategoryAxis
Merge branch 'master' into 831-gutterCategoryAxis

Conflicts:
	plottable.js
Updating built files
Merge pull request #832 from palantir/831-gutterCategoryAxis

831 - Width and height account for gutter