Copy custom config files to docker image

[hakonhagland]

Copies a snapshot of LibreOffice config files into the docker image. The config files have been modified from the default LibreOffice config files in two ways:

• First, document comparison mode has been disabled, see PR Updated README.md with information about disabling document comparison option #204 for details,
• Second, the parts sub directory inside the image has been added as a trusted location to get rid of the popup dialog "Would you like to change the document, and update all links to get the most recent data?", see How to get rid of the popup dialog "Would you like to update all links to get the most recent data?" #67 for details.

[blattms]

First, document comparison mode has been disabled, see PR #204 for details,

Will this still allow us to compare two different documents (Open the update one, Edit -> Track changes -> Compare Document, and use the old version)? That option is actually quite handy.

[hakonhagland]

@blattms I am not sure why we we would use libreoffice to compare two different documents when we already have git version control? Can you elaborate on that idea?

Anyway, as I remember it, this pull request was in accordance with the README.md file which suggests that we turn off document comparison mode. If the user still want document comparison he could he could avoid using the docker container version of libreoffice or he could manually re-enable the mode from the menu in libreoffice. But it is not recommended if he plans to submit a clean PR..