updating DIRECTORY.md

Author: cclauss

DIRECTORY.md

@@ -181,6 +181,7 @@
 ## [Computer Vision](computer_vision)
   * [Cnn Classification](computer_vision/cnn_classification.py)
   * [Flip Augmentation](computer_vision/flip_augmentation.py)
+  * [Gramian](computer_vision/gramian.py)
   * [Haralick Descriptors](computer_vision/haralick_descriptors.py)
   * [Harris Corner](computer_vision/harris_corner.py)
   * [Horn Schunck](computer_vision/horn_schunck.py)
@@ -231,6 +232,7 @@
   * [Lempel Ziv](data_compression/lempel_ziv.py)
   * [Lempel Ziv Decompress](data_compression/lempel_ziv_decompress.py)
   * [Lz77](data_compression/lz77.py)
+  * [Move To Front](data_compression/move_to_front.py)
   * [Peak Signal To Noise Ratio](data_compression/peak_signal_to_noise_ratio.py)
   * [Run Length Encoding](data_compression/run_length_encoding.py)
 
@@ -324,16 +326,19 @@
     * [From Sequence](data_structures/linked_list/from_sequence.py)
     * [Has Loop](data_structures/linked_list/has_loop.py)
     * [Is Palindrome](data_structures/linked_list/is_palindrome.py)
+    * [Kth Element From End](data_structures/linked_list/kth_element_from_end.py)
     * [Merge Sort Linked List](data_structures/linked_list/merge_sort_linked_list.py)
     * [Merge Two Lists](data_structures/linked_list/merge_two_lists.py)
     * [Middle Element Of Linked List](data_structures/linked_list/middle_element_of_linked_list.py)
+    * [Partition Linked List](data_structures/linked_list/partition_linked_list.py)
     * [Print Reverse](data_structures/linked_list/print_reverse.py)
     * [Reverse K Group](data_structures/linked_list/reverse_k_group.py)
     * [Rotate To The Right](data_structures/linked_list/rotate_to_the_right.py)
     * [Singly Linked List](data_structures/linked_list/singly_linked_list.py)
     * [Skip List](data_structures/linked_list/skip_list.py)
     * [Sorted Linked List](data_structures/linked_list/sorted_linked_list.py)
     * [Swap Nodes](data_structures/linked_list/swap_nodes.py)
+    * [Xor Linked List](data_structures/linked_list/xor_linked_list.py)
   * Queues
     * [Circular Queue](data_structures/queues/circular_queue.py)
     * [Circular Queue Linked List](data_structures/queues/circular_queue_linked_list.py)