Continuing converting ScMyTables in feature/gsoc-calc-perf

Hi, Kohei and Markus,

I just pushed some changes to feature/gsoc-calc-perf for ScMyTables to 
reduce use of CellAddress and instead use ScAddress.  Nothing too 
exciting there.

I think before I can move forward, I need to know what to do about 
ScMyTables::IsMerged(), ScMyTables::DoMerge(), and 
ScMyTables::UnMerge().  ScMyTables references its own merge methods, but 
I'm not sure what would cause these methods to be actually be called.  
They aren't called on the test files I've tried so far.  As we have 
discovered, the merge methods in ScXMLTableRowCellContext are called, 
though.  What do you sc gurus think?

I need to figure out what to do with the merge methods because the 
ScMyTables add/new/insert row/column methods reference the ScMyTables 
merge methods (although the code path that references them never seems 
to be taken.)

I think most of the other methods will follow fine from there except for 
GetCurrentXDrawPage() and GetCurrentXShapes() which are separate from 
the merge method concern.  These methods get into things like xmloff's 
XMLShapeImportHelper.  Do we want to go here?

And of course we have already discussed trying to reexamine 
ScMyTables::SetTableStyle() at some point.


Respectfully,
Daniel Bankston