AUI-1399 Create tutorial for ColorPicker

See: [AUI-1399](https://issues.liferay.com/browse/AUI-1399)
Note: the jira ticket is to create both a tutorial and examples for this
module. This commit only contains the tutorial part. At this point, all
the submodules except the popover menu work by using the base submodule --
the popover one has to use the specific popover submodule.