dgarijo/Widoco: WIDOCO 1.4.1: Metadata support and major bug fixes

WIDOCO now will comply with most of the terms listed in https://w3id.org/widoco/bestPractices. A few of them are still unsopported (e.g., rdfs:seeAlso) and will be added in next releases. In this version, I have added support for all the deprecation terms in LODE, as well as support for skos:prefLabel and better recognition of some of the terms when the range can be a String or a resource. Changes: Now the examples have a "pre" label, so if they include rdf text or json text they show properly. A pointer to the guidelines has been added in the interface When invoking the program using command line, the default behavior is to load the properties from the ontology. Only if a config file is provided, the properties won't be loaded. There is still a flag, which I have preferred to leave for possible legacy issues. Markup is now recognized in all sections The diagram is now optional (by default it was always produced in older versions) This release also includes a doc folder with guidelines on the metadata properties to use, a benchmark of ontologies used for testing, a gallery with what WIDOCO can accomplish and a summary of projects that have adopted WIDOCO. Bug fixes: Changed the pom file with another plugin for creating the JAR, because some of the RIO parsers were not creating the appropriate serializations of the ontology. Added robustness when the changelog was created. If a wrong URI is provided, then the changelog will not be created. Changed how the ontology is chosen so there won't be errors in MAC systems. Fixed some of the language tags. Polished some errors related to the interface