Fixed issue with 5/3-prime placement for cadnano reader

mrdna/readers/cadnano_segments.py

@@ -472,12 +472,12 @@ class cadnano_part(SegmentModel):
 
     def _add_prime_ends(self):
         for h,fwd,z in self._5prime_list:
-            seg, nt = self._get_segment_nucleotide(h,z)
+            seg, nt = self._get_segment_nucleotide(h,z, fwd)
             # print("adding 5prime",seg.name,nt,fwd)
             seg.add_5prime(nt,fwd)
 
         for h,fwd,z in self._3prime_list:
-            seg, nt = self._get_segment_nucleotide(h,z)
+            seg, nt = self._get_segment_nucleotide(h,z, not fwd)
             # print("adding 3prime",seg.name,nt,fwd)
             seg.add_3prime(nt,fwd)