add pipenv settings

Pipfile

@@ -0,0 +1,18 @@
+[[source]]
+url = "https://pypi.org/simple"
+verify_ssl = true
+name = "pypi"
+
+[packages]
+requests = "*"
+click = "*"
+shell = "*"
+
+[dev-packages]
+"flake8" = "*"
+"pep8-naming" = "*"
+radon = "*"
+xenon = "*"
+
+[requires]
+python_version = "3.5"