Release 2.2.4

Updated example.

Removed print statement.

Updated version number.

renamed namespace to mlrose_hiive

Preparation for pypi

Update version number

Increment version number for new minor release.

Added restarts option to NeuralNetwork()

Added restarts option for random_hill_climb algorithm. Addresses issue hiive#24.

Fix bug in MIMIC algorithm

Fix infinite loop issue identified in hiive#17

Reverted to previous version numbering