oeg-upm/Morph-KGC: 1.5.0

Added safe_percent_encoding option to avoid percent encoding of specific characters. The default value of clean_output_dir has modified to false. Several changes regarding hierarchical data sources (JSON and XML): Migration from lxml to elementpath library. This entails that from this version, Morph-KGC uses XPath 2.0. References in the mapping rules can access elements in lower levels of the tree (e.g. author.name in JSONPath or author/name in XPath). Minor bugs fixed