removed loop and test in loadbuffer, setcolor bug fixed, snapshot bug fixed

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013lasem@33293 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Fixed layout and scaling bug with svg export

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013lasem@33294 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
Implemented getDescent, unref objects in destructor

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013lasem@33296 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6