Added .DS_Store & .settings & .project to gitignore

Added .DS_Store & .settings & .project to gitignore
Added useRomanNumeralsForCenturies param allowing roman numbers like XXth century

Added useRomanNumeralsForCenturies param allowing roman numbers like XXth century
Updating function to treat roman numbers

Updating function to treat roman numbers
Allowing roman numbers in century expressions (XXth century)

Allowing roman numbers treatment in century expressions like "XXth century" if useRomanNumeralsForCenturies is set to true in datetime.conf