Signal PieceTable Changes have finished

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013tables@33393 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
fix the remove header

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013tables@33394 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
fix code style

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013tables@33397 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
refactor the table header render logic : add format for them

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013tables@33402 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6
1. remove the duplicate header row numbers
2. refactor header drawing: add format

git-svn-id: svn+ssh://svn.abisource.com/svnroot/abiword/branches/gsoc2013tables@33407 bcba8976-2d24-0410-9c9c-aab3bd5fdfd6