Sphere.py refactor - Githubissues

Description

Refactor sphere.py script

Algorithm	Original (Archive Coverage)	Original (QD Score)	Refactor (Archive Coverage)	Refactor (QD Score)	Coverage Diff (Original - Refactor)	QD Diff (Original - Refactor)
map_elites	57.25%	11597769.32	56.97%	11571356.02	0.28%	26413.297
line_map_elites	73.23%	14485305.84	73.91%	14642630.71	-0.68%	-157324.875
cvt_map_elites	83.92%	653348.332	83.22%	647366.178	0.70%	5982.154
line_cvt_map_elites	93.31%	710790.833	93.81%	716966.721	-0.50%	-6175.888
me_map_elites	69.63%	563973.144	74.69%	599778	-5.06%	-35804.856
cma_me_imp	92.67%	17674295.57	91.94%	17557994.96	0.73%	116300.614
cma_me_imp_mu	93.14%	18026125.48	92.89%	17638549.26	0.25%	387576.221
cma_me_rd	95.98%	13442157.13	97.49%	14091331.52	-1.50%	-649174.389
cma_me_rd_mu	96.96%	12250969.04	97.32%	12678772.11	-0.35%	-427803.075
cma_me_opt	11.85%	2571301.066	10.00%	2286697.895	1.85%	284603.171
cma_me_mixed	95.94%	18003627.85	95.40%	17734082.1	0.54%	269545.758
cma_mega	100.00%	752920.931	99.98%	750966.465	0.02%	1954.466
cma_mega_adam	100.00%	752991.517	100.00%	753011.636	0.00%	-20.119
cma_mae	80.57%	629880.414	81.47%	634876.522	-0.90%	-4996.108
cma_maega	100.00%	753845.357	100.00%	753848.658	0.00%	-3.301

[x] I have read the guidelines in CONTRIBUTING.md
[x] I have formatted my code using yapf
[x] I have tested my code by running pytest
[x] I have linted my code with pylint
[x] I have added a one-line description of my change to the changelog in HISTORY.md
[x] This PR is ready to go