Biblos 5.49

Update of 25/09/2021 - New structure for characters, the functionality of which Biblos makes extensive use. Also the customization window has commands for a better management of them. - Updated the table of Unicode characters, with about 3000 more characters. Unicode characters are used when moving from character to character. - Profound changes to the communication protocol of Biblos with braille printing templates, so there may be some anomalies (although tests have shown that everything is correct). - Update of the Brazilian-Portuguese interface by Cassio Santos, of the French interface by Elio Medici, of the Serbian interface by Gradimir Kragic. - Bug fixes.