Rebuild files when symbols are added to or removed from it.  This previously wasn't an issue because this could only happen if the file itself changed, and thus was already on the list.  However, now this can change when the configuration files like Topics.txt and Languages.txt change but the source file itself does not.
Rebuild files when symbols are added to or removed from it.  This previously wasn't an issue because this could only happen if the file itself changed, and thus was already on the list.  However, now this can change when the configuration files like Topics.txt and Languages.txt change but the source file itself does not.


git-svn-id: 98898d48182945044bd4ba440757b4f5b6ba6d1c@475 6b081834-2649-4b4f-abbc-426aeab4333c

prantlf/NaturalDocs,prantlf/NaturalDocs,prantlf/NaturalDocs