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)
@@ -1404,6 +1405,7 @@
   * [Selection Sort](sorts/selection_sort.py)
   * [Shell Sort](sorts/shell_sort.py)
   * [Shrink Shell Sort](sorts/shrink_shell_sort.py)
+  * [Sleep Sort](sorts/sleep_sort.py)
   * [Slowsort](sorts/slowsort.py)
   * [Smoothsort](sorts/smoothsort.py)
   * [Stalin Sort](sorts/stalin_sort.py)