Changing np.matrix to np.array, changing .dot to @ (Issue #115)

[kyberszittya]

I replaced '.dot' operation to '@' in my previous PR:

• EKF SLAM
• Iterative closest Point

Also changed to np.array in the following:

• GraphSLAM

[coveralls]

Pull Request Test Coverage Report for Build 598

• 41 of 45 (91.11%) changed or added relevant lines in 3 files are covered.
• 2 unchanged lines in 1 file lost coverage.
• Overall coverage increased (+0.05%) to 83.644%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
SLAM/GraphBasedSLAM/graph_based_slam.py	25	29	86.21%

Files with Coverage Reduction	New Missed Lines	%
PathPlanning/BatchInformedRRTStar/batch_informed_rrtstar.py	2	87.05%

Totals
Change from base Build 588:	0.05%
Covered Lines:	6423
Relevant Lines:	7679

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💛 - Coveralls

[AtsushiSakai]

@kyberszittya Great!!. Thank you!!