Sorted entries in polish.bib
Fixed font encoding error in polish language support
Added german Arbeau translation
Added spanish small sequence dance
Fixed errors
Added Arbeau translation commentator
Updated Livio Lupi books description
Added more itatian libri di gagliarda
Added Prospero Luti book transcription
Fixed ampersand specing in Luti transcription
Added three 20th century dancing cards
Added Alled Dodworth group to american.bib
Added ten Allen Dodworth music editions
Added ten more Allen Dodworth music editions
Fixed contraint violation in english.bib
Added validation.log file
Updated .gitignore
Added urls folder
Fixed some contraint violations
Renamed d'Alembert url file