Freeze to generate an updated
generate an archive
gpg sign an archive
support for github charms
support for revision of charms as of date
include-env for shell env var inclusion


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- allow for specifying list of lists for a single rel entry.
- include variable for env uuid and name
- charm branch parse for info

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Bugs encountered
  - http://pad.lv/1174616 [wedged unit]
  - http://pad.lv/1174613 [relation-list -r]
  - http://pad.lv/1174610 [unit-id recycling]