* Add alignment options for title plugin.
Alignment can be set to 'start', 'center'. or 'end'. A new sample has been added as well.
* Update sample file title
* (feature) Added separate top and bottom padding for title plugin.
* Added regular padding multiplier like how it was before.
* Now makes use of toPadding helper.
Fixed typo in toPadding helper.
* Fixed requested changes.
The title plugin and scale title now accept lineHeight specified using unitless value (1.4), length ('1.4em' or '12px'), percentage ('200%') or keyword ('normal' === 1.2). The line height parsing has been refactored under the 'Chart.helpers.options' namespace. Also fix incorrect text positioning in the title plugin.
https://developer.mozilla.org/en-US/docs/Web/CSS/line-height
