Shellfoundry

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* Fixed issue in "generate" command after renaming root folder

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* Added "get_templates" command
* Added "delete" command
* Removed driver zip-file after pack command
* Added generating shell documentation based on the template

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* Set strict python version

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* Removed unnecessary cloudshell-automation-api dependency from requirements
* Set static version for package click in requirements. click==6.7

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* Fixed bug in verification template and standards compatibility

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* Added dynamical determination of minimal CloudShell version from templates