Changes in LibKFacebook (updated pull request)

Hi,
I've closed old pull request, there was error: I forgot to add FindChoqok, FindQJson, FindQtAuth.

This pull request contains following changes:
 - I've reorganized header files in following way:
local includes first, then chook includes, libkfbapi, Kde, Qt.
It is easier to working with code if headers are organized.
 - There was a lot of trailing whitespaces.
 -  LibKFacebook was renamed to LibKFbAPI
 -  LikKFacebook got rid of QSharePointers 
 - FindChoqok, FindQJson, FindQtAuth
 - Linking with CHOQOK_LIBRARIES instead of choqok

Best regards,
Tatjana