Update Doxygen config file to 1.8.7 and ignore Documentation/ sub-directory.
Update Doxygen config file to 1.8.7 and ignore Documentation/ sub-directory.

git-svn-id: 4d207786bcfdcf18f314dcbc6ac3fbe5f8a98c88@553 ac7aa084-b6da-11df-bf42-7fac39f0224f

DominicDirkx/tudat,Tudat/tudat,DominicDirkx/tudat,magnific0/tudat-svn-mirror,DominicDirkx/tudat,JPelamatti/TudatDevelopment,JPelamatti/TudatDevelopment,Tudat/tudat,JPelamatti/TudatDevelopment,Tudat/tudat,magnific0/tudat-svn-mirror,Tudat/tudat