Ansible-inventory

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- Fixed group renaming

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- Restrucutred and improved the completion code
- Several bugfixes and improvements

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- Instantiating console only when needed. This should solve some problems with scripts.
- Added "edit vars" to edit vars with $EDITOR

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- Fixed console exiting on actions

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- Fixed importation
- Improved tests
- Improved completion for 'show'
- Fixed 'in_groups' filter in 'show' applying OR instead of AND filtering

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- Fixed dependencies