Suggestion: Embed the EPIM version number into CHM help files

[mvisconte]

For those of us who keep earlier versions around and try to organize our installs, I request that a version number be added to the file metadata of EssentialPIM.CHM (the help file).

This will help the users associate the correct help files with exe versions.

Internal (metadata) versioning should match the internal metadata file version of the matching EXE file.