File README.md of Package meta-package

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# snapshot repository emulator
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This is generating a package with the goal to enforce defined
versions of a package based on a given updateinfo.xml file.

Goals:
 * Do not enforce the installation of a package
 * But when installed, it must be a certain version

This is currently implemented via conflicts due to unknown
reasons.

Shouldn't these be conditional requires instead?
eg.:

 Requires: abcd-1.2.3 if abcd

?

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Do *NOT* use this package for any image or container. You
won't be able to build it or only for a very short time frame.

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