improve matrix formatting: TCNJ/TCNJ_MatrixInverse/problem15.pg
Merge pull request #42 from Dick-Lane/master

Q32 is crucial, Q26 may help some students
new vector space problem
Improve domain for answer checking: Michigan 3.6/Q15.
Improve matrix formatting: TCNJ/TCNJ_IntroLinearTransformations/problem2.pg
Minor change in text.
Merge branch 'master' of git://github.com/openwebwork/webwork-open-problem-library
New vector space problem.
Minor change in notation.
Fix bug 2826
Fix section tag
Fixing tag
New abstract vector space span problem.
New vector space span problems.
Addresses bug 2825, wrong answer
Merge branch 'master' of github.com:openwebwork/webwork-open-problem-library
Fix bug 2825
Modify domain of function evaluation
Fix bug 2747.
Merge branch 'master' of github.com:openwebwork/webwork-open-problem-library