commit: bidi stuff

[Tomas Frydrych]

this is first part of work toward a functioning top ruler in the bidi 
version; it is not yet finished, but well on the way  -- this has proven 
to be the most tedious job of all the bidi work so far; yesterday at 
midnight it felt like I was almost there, at 3 am it felt no closer :-).

I have tested the non-bidi build to make sure that nothing got 
screwed up in the process; I will be out of commission for the next 
two weeks so if for some reason this should cause serious 
problems, someone else will probably need to revert it.

Tomas

Files modified: ap_TopRuler.cpp, fp_Run.cpp, fp_Line.cpp