saves math item as svg

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013lasem@33286 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Mathrun calls setFont

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013lasem@33287 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6