Add a new `offset` option to scales to add extra space at edges and remove the `includeOffset` argument from `getPixelForValue()` and `getPixelForTick()`. The bar controller now automatically calculates the bar width to avoid overlaps. When `offsetGridLines` is true, grid lines move to the left by one half of the tick interval, and labels don't move.
* Fix relative links in documentation of configurations
* Fix relative link of 'Time Units'
* Fix relative links for chart types documentations
* Fix the release version link in developers/plugins
