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Behavior change:
* .rpz pack format changed (version 1 -> 2). Pack is now uncompressed, data is in a nested TGZ archive; allows faster retrieval of metadata (config & trace).
* reprozip trace warnings are now info messages; won't show up without -v
Bugfixes:
* After restarting a Vagrant machine, /dev and /proc wouldn't be mounted anymore
* Files or links referenced in a shebang could be missed by the tracer
Features:
* Runs in the configuration file now have an 'id' field, that will be shown by 'reprounzip info' and can be selected when running
* Reworked `reprounzip graph`: level of details, regex filters & replace, JSON output
* Added *run* argument to `reprounzip showfiles`, to show inputs & outputs of a single run