Improve versioning of CHMs

Original Reporter info from Mantis: marco @marcoonthegit

• Reporter name: Marco van de Voort

Description:

In generated CHMs, the (a) version of the FPC chmlib should be annotated, as well as the version of the app that uses the chmlib (fpdoc/compile*latex/chmcmd)

Mantis conversion info:

• Mantis ID: 20034
• Version: 2.7.1
• Fixed in revision: 19703 (#0d562f04)
• Target version: 2.6.0