Added LasemMathManager and LasemMathView classes

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013lasem@33235 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
fixed LasemMathClasses to compile

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013lasem@33238 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6