Default map size should be customizable.
Minor optimization in TBSpaceAllocator
Added TBBitmapFragment GetAllocatedHeight.
Debugging improvement of TBBitmapFragment

-Clear in different shades
-Worked around bug with visual studio variable watcher
Optimized reuse of fragment space.

-Sort rows.
-Merge empty rows so larger fragments have a chance of allocating the space.
Introduced font glyph cache, shared between faces & sizes.