Only remove the nullspace in a direction if the user specifies it
Add tests
Hmmm, maybe start counting at one?
Merge branch 'master' of github.com:geodynamics/aspect into nullspace
Fix typo
Roll back, make it so that net_translation and linear_momentum are just sums
Add net_translation, linear_momentum as options
Try again to prettify the nullspace logic
Merge pull request #43 from ian-r-rose/nullspace

Fix bug in nullspace removal