Update critical css grunt config and task, file naming, etc.
Bump version numbers grunt packages.
Don't justify text (not so good habit anyway) and don't maximaze text width of direct descendents of the `Copy` class.
Add and check of shorter iOS home screen bookmark title.
Update (cleanup) html head snippets (desktop and mobile), plus add 'critical' css file variable (set via include snippet in templates).
Update templates with critical css variable (passed via snippet_detect).
Update 'build' and 'release' tasks with 'critialcss' task.
Build v0.1.20.