Automatic package download

[numere-bot]

DESCRIPTION

Describe, what you observe or want to be changed:
If a package is locally missing, the installer just throws an error instead of looking it up in the online package repository. This is hindering acceptance of the packaging system.

Describe, what you expect to happen:
If a package is locally missing, the installer should look it up on the remote package repository and ask, if it shall download the found match and install it.

---

DEVS' SECTION

ANALYSIS

(Describe, what's the issue and which changes have to be made)

IMPLEMENTATION STEPS

(see also our Wiki for implementation guidelines)

• Implement the necessary changes in a new branch created here on GitHub
• Test your implementation

DOCUMENTATION STEPS

(see also our Wiki for further information)

• Update the changes log
• Add comments to your implementation
• Add Doxygen documentation comments- Create or update the documentation articles (*.NHLP and *.NDB files, if needed)
• Update the language strings (*.NLNG files, if needed)

PULL REQUEST

• Create a pull request for your changes
• Fill out the template
• Assign @numere-org/maintainers as reviewers