updating DIRECTORY.md

Author: cclauss

DIRECTORY.md

@@ -986,6 +986,7 @@
   * [Doppler Frequency](physics/doppler_frequency.py)
   * [Escape Velocity](physics/escape_velocity.py)
   * [Grahams Law](physics/grahams_law.py)
+  * [Hamiltonian](physics/hamiltonian.py)
   * [Horizontal Projectile Motion](physics/horizontal_projectile_motion.py)
   * [Hubble Parameter](physics/hubble_parameter.py)
   * [Ideal Gas Law](physics/ideal_gas_law.py)
@@ -1381,6 +1382,7 @@
   * [Intro Sort](sorts/intro_sort.py)
   * [Iterative Merge Sort](sorts/iterative_merge_sort.py)
   * [Kirkpatrick Reisch Sort](sorts/kirkpatrick_reisch_sort.py)
+  * [Library Sort](sorts/library_sort.py)
   * [Merge Insertion Sort](sorts/merge_insertion_sort.py)
   * [Merge Sort](sorts/merge_sort.py)
   * [Msd Radix Sort](sorts/msd_radix_sort.py)