Fix linux installer bug on Fedora 19

Can't believe no one's hit this one until now!


git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2837 41b19578-b77a-4e3b-9682-c8570d237623
Update test cases that had their results changed when the Hermite-Gauss bug was fixed.

git-svn-id: svn+ssh://svn.code.sf.net/p/xmds/code/trunk/xpdeint@2838 41b19578-b77a-4e3b-9682-c8570d237623