Revised surface.py to conform to PEP-8 through line 29 (preparing to wmodify line 26)
Branch: i30_pythongeometry | Intent: Create module of native Python functions to
	replace numpy functions used in eppy geometry modules
Commit Intent: Modify surface.py to test for availabilty of numpy and switch to alt.
	module when not available
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*eppy/geometry/surface.py
-Modified the import numpy statement to try, and substitute new module when not avail...

**py.test: PASS