Added #1799 Text tags editor has new parameter [space xxx] specifying exact letter advance value (add to the font advance + calculated letterspacing)

Changed #802 - FLA export - calculating letterspacing on text with fonts without layout is now optional 
 and turned off by default

XFL converter - do not convert shapes twice
Shape fixer - intersections - ignore problems

libsrc/ffdec_lib/src/com/jpexs/decompiler/flash/math/Intersections.java

@@ -207,7 +207,13 @@ public class Intersections {
         )
         );
 
-        List<Double> roots = poly.getRoots();
+        List<Double> roots;
+        try {
+            roots = poly.getRoots();
+        } catch (RuntimeException rex) {
+            //Y values of bounds must be of opposite sign.  ??fixme??
+            return result;
+        }
         for (double s : roots) {
             if (0 <= s && s <= 1) {
                 Polynomial xp = new Polynomial(Arrays.asList(