Biblos 5.18

Updated of 13/04/2018 - In the tactile graphics environment I reprogrammed the design of strings and strings, the version of the figures that use the bezier curves (ArcB and ChordB). There may still be problems; - More than corrections for the epubs it has been a real integration of functionality. Now with some epubs there should be no more problems; - In Braille transcription I added a control to detect codes with no text string. The situation should never happen, yet it has; - I added the trigonometric instruction Arctan2, which returns the arc of the tangent of an X Y coordinate.