Hydrilla

specify a schema for packages listing generated by Hydrilla

move all schema files to 2.x version series

This commit also introduces:

• combined source definitions of resource and mapping,
• dependencies on mappings,
• permissions,
• Haketilo version constraints.

support piggybacking on other software systems in Hydrilla source packages

fix local reference in common_definitions schema

• common_definitions-1.0.1.schema.json: change "$ref" line
• : rename to version 1.0.1
• api_mapping_description-1.0.1.schema.json, api_query_result-1.0.1.schema.json, api_resource_description-1.0.1.schema.json, api_source_description-1.0.1.schema.json, package_source-1.0.1.schema.json: update regular expression pattern for validation of "$schema" property...

make "uuid" an optional property

specify full schema URL in instances

facilitate including instance generator software info

change URL in schema 's

make resource dependency specifier an object

refactor some definitions into a separate file and add schemas for API endpoints

make 'definitions' a mandatory property

use proper metaschema URL

add REUSE files

initial commit