Added variants of A* (AtsushiSakai#395)

* Add files via upload

* Add files via upload

* Update test_a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update test_a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update a_star_variants.py

* Update test_a_star_variants.py

* Add files via upload

* Delete test_a_star_variants.py

* Update test_a_star_variants_iterative_deepening.py

* Update test_a_star_variants_beam_search.py

* Update test_a_star_variants_dynamic_weighting.py

* Update test_a_star_variants_jump_point.py

* Update test_a_star_variants_theta_star.py

* Update test_a_star_variants_beam_search.py

* Update test_a_star_variants_beam_search.py

* Update test_a_star_variants_dynamic_weighting.py

* Update test_a_star_variants_iterative_deepening.py

* Update test_a_star_variants_jump_point.py

* Update test_a_star_variants_theta_star.py

* Update test_a_star_variants_beam_search.py

* Update test_a_star_variants_dynamic_weighting.py

* Update test_a_star_variants_iterative_deepening.py

* Update test_a_star_variants_jump_point.py

* Update test_a_star_variants_theta_star.py

* Update a_star_variants.py

* Add files via upload

* Add files via upload

* Delete test_a_star_variants_beam_search.py

* Delete test_a_star_variants_dynamic_weighting.py

* Delete test_a_star_variants_iterative_deepening.py

* Delete test_a_star_variants_jump_point.py

* Delete test_a_star_variants_theta_star.py

* Added requested changes

* Added requested changes

Author: sarimmehdi