Import the correct stylesheet in all demos
Merge pull request #22 from psunkari/regressions

Import the correct stylesheet in all demos
Merge pull request #32 from midoringo8823/bug_fix

Help tree-shaking out some code by cleaning up internal usages of utility methods.
Merge pull request #33 from midoringo8823/bug_fix

Fix the dimensionUsingBand to actually use the column index defined inst...
Modified code to actually apply the custom scales to axis when user register a ChartAxisConfig.
- Fix logic in chart_area_impl to use config for scale.
- Apply tickValues in ChartAxisConfig if sepcified.
- Added useDefaultRange for custom scale to use chart area layout to compute range on the scale.
- Added demo to demonstrate how to define a custom scale.

remove useDefaultRange and always use default range.
Merge branch 'bug_fix' of https://github.com/midoringo8823/charted into bug_fix

Conflicts:
	demos/charts/web/custom_axis_demo.dart
	demos/charts/web/custom_axis_demo.html
	lib/charts/src/chart_axis_impl.dart