Version 0.5.5

• Using pdfalto instead of pdf2xml for the first PDF parsing stage, with many improvements in robustness, ICU support, unknown glyph/font normalization
• Improvement and full review of the integration of consolidation services, supporting biblio-glutton (additional identifiers and Open Access links) and Crossref REST API (add specific user agent, email and token for Crossref Metadata Plus)
• Fix bounding box issues for some PDF #330
• Updated lexicon #396