Branch: i30_pythongeometry | Intent: Create module of native Python functions to
	replace numpy functions used in eppy geometry modules
Commit Intent: Create exception handling for all functions
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*eppy/geometry/py_numeric.py
-Modified the example calculation in the docstring of the dot-product function to match
 the test case...
-Added an error handling class based on linalg.py from numpy...

**py.test: PASS
**pep8: PASS