First draft of the metadata content indexer for npm (package.json) T715
for indexing content in content_metadata we want to use metadata tools to extract metadata from manifest files and keep in same format(syntax) and with same terms(semantic)
temp solution: in Metadata_Dictionary class dispatch the content for parsing and translation using hard coded mapping (should be extracted from storage) to translate package.json files to codemeta terms
testing: in test_metadata 3 running tests for the compute_metadata function with and without content and for the metadata indexer (the storage part of it isn't implemented) with local npm mapping
Migrated from D215 (view on Phabricator)