suzerain: update .gitignore

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42240 0bd85f0b-c151-43b9-a1e9-27231104551f
suzerain: #2492 fix blasius_v computation

I had a sign and scaling error in blasius.m and blasius.c.
Other bits updated to match.

In bl.c I disabled the relative tolerance on the crossing.
It was meaningless as we were comparing relative to zero.

git-svn-id: https://svn.ices.utexas.edu/repos/pecos/suzerain/trunk@42241 0bd85f0b-c151-43b9-a1e9-27231104551f