add example on how to optimize KNN parameters using NiaPy

Author: GregaVrbancic

Diff for: .gitignore

@@ -0,0 +1,112 @@
+
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Diff for: optimize_KNN_parameters/Pipfile

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+[[source]]
+
+url = "https://pypi.python.org/simple"
+verify_ssl = true
+name = "pypi"
+
+
+[packages]
+
+niapy = "*"
+numpy = "*"
+scikit-learn = "*"
+pygal = "*"
+lxml = "*"
+cairosvg = "*"
+
+
+[dev-packages]
+
+
+
+[requires]
+
+python_version = "3.6"