Add tasks for all the new languages

Task/Pascals-triangle/Phix/pascals-triangle.phix

@@ -0,0 +1,12 @@
+sequence row = {}
+for m = 1 to 13 do
+    row = row & 1
+    for n=length(row)-1 to 2 by -1 do
+        row[n] += row[n-1]
+    end for
+    printf(1,repeat(' ',(13-m)*2))
+    for i=1 to length(row) do
+        printf(1," %3d",row[i])
+    end for
+    puts(1,'\n')
+end for