Add LinearAlgebraTools.py tests

Check Vec, Mat constructors
Check basic linear algebra
Check norms observe absolute homogeneity and triangle inequality
Add Vec/Mat doctests

Test with: python -m proteus.LinearAlgebraTools -v
fixed a few bugs in the norm calculations and tests
Merge pull request #52 from erdc-cm/add_linear_algebra_tools_tests

Add LinearAlgebraTools.py tests