Installable celix container

[rlenferink]

Add support to install celix container with a install_celix_container command.

The install command should ensure that the celix container does not depend on a workdir location.

This means a solution is needed for the work dir created .cache dir and a how to specify bundles without using absolute paths.

A possible solution is to create a "fat" executable containing the bundles inside the binary.

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Original creation date: 09/Apr/2019 Reporter: @pnoltes