All versions of French Revolutionary Calendar

1.18.1: Take into account the roman numeral setting in the converter. Maintenance. 1.18.0: Add Basque translation and fix default font selection. 1.17.4: Fix spelling of Sansculotides, to use the spelling from the original decree. 1.17.3: Fix widget and notification bugs on Oreo. 1.17.2: Fix crash in new date converter. 1.17.1: New converter, to convert both ways, between the revolutionary and Gregorian calendars. 1.16.0: Replaced OpenSans font with Roboto font