added support for '-' and '.' but both not as the first as first character

Author: oni303

app/src/processing/app/Sketch.java

@@ -2063,9 +2063,10 @@ static public String sanitizeName(String origName) {
     for (int i = 0; i < c.length; i++) {
       if (((c[i] >= '0') && (c[i] <= '9')) ||
           ((c[i] >= 'a') && (c[i] <= 'z')) ||
-          ((c[i] >= 'A') && (c[i] <= 'Z'))) {
+          ((c[i] >= 'A') && (c[i] <= 'Z')) ||
+          ((i > 0) && (c[i] == '-')) ||
+          ((i > 0) && (c[i] == '.'))) {
         buffer.append(c[i]);
-
       } else {
         buffer.append('_');
       }