added first draft for getting mass and stiffness jacobian. single_phase_gw/test_single_phase_gw.test_mass_and_stiff_jacobians has simple test that worked
minor alteration to documentation for linftyNorm
add Diffusion_SIPG_exterior for SIPG weak boundary conditions
periodicDirichletConditions seems to be required for some cases but not in default_n
Revert "added first draft for getting mass and stiffness jacobian. single_phase_gw/test_single_phase_gw.test_mass_and_stiff_jacobians has simple test that worked"

This reverts commit 5b8d6685ee551d9bbae09dabded818d672b9f59d.
Tweaked spacing in comment
couple of small changes
Merge branch 'lea/workshop_branch' of https://github.com/erdc-cm/proteus into lea/workshop_branch

Conflicts:
	src/LinearAlgebraTools.py
Merge pull request #57 from erdc-cm/lea/workshop_branch

minor alteration to documentation for linftyNorm
Merge branch 'master' into alex/imrpove_linalg_tests
minor reformatting
Merge pull request #58 from erdc-cm/alex/imrpove_linalg_tests

I add my non-working docstring
Merge pull request #62 from erdc-cm/fix_periodicConditionsFlag_and_Diffusion_SIPG

Fix periodic conditions flag and diffusion sipg
Merge branch 'master' into alex/improve_linalg_tests
added comm initialization so wDoc is computed correctly