Support resource.type

[peterdesmet]

CHANGELOG: https://datapackage.org/standard/data-resource/#type

• Requires Create version() function #225
• If not provided, look for profile first. If set to tabular-data-resource, assume table
• If not provided, then detect from file. Or make the frictionless-r decision to always assume table
• Implement
• Update documentation (anywhere Tabular Data Resource is mentioned)
• Update tests
• Update examples