Tapis-cli

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* Updated docs
* Implemented support for legacy agave.\* and date\_time.\* template variables
* Tapis apps update now validates specified appId as intended

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* Added nonce support to more actors commands. Leaving it off management command until requested
* Implemented ability to pass nonces to select Tapis actors commands
* Fixed issue in TaccApisBearer where direct client was not getting initialized when api\_server and/or token were passed
* Fixed an issue preventing some uses of 'apps deploy'
* Fixed issue where apps deploy failed to detect missing project.ini. Enforce presence of app name and version in project configuration file for apps deploy
* Fixed missing import preventing tapis actors submit from working

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* docs
* Implemented working tapis actors deploy
* The actorid module implements cacheing of the the current project's actor identifier
* Implemented reactor.rc loader which can return either a configparser or dict, just like our ini file loader
* Turn off Docker overrides in apps deploy. Clarify difference between app and system grants in apps deploy help text
* Migrated repository name to tapis-cli from tapis-cli-ng
* Job outputs list and download now handle .dotfiles as intended
* Files list and upload commands now handle dotfiles. Turns out I was not honoring the contents of the --all CLI option. Files upload and download now only have an --exclude option to address the potential for conflict between include and exclude patterns. May be able to solve in future by making them mutually exclusive
* WIP: Starting actors deploy

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* Tweaks based on user testing
* Needed to instantiate ActorIdentifier before calling its get\_identifier function
* Updated docs
* Formatted code
* Implemented tapis actors create|update

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* Added support for specifying keys and passwords via CLI in 'systems create' and 'systems update'. Updated docs. Closes 315
* Added documentation for how we avoid BrokenPipe errors
* Added tapis jobs outputs log JOB\_UUID command. Closes 312
* Bump agavepy to latest alpha
* postits create now accepts (and translates to http) agave:// files URI. Closes 311
* Apps deploy now grants system roles when granting private app permissions
* Namespaced version, label, and description options in apps init. This fixes the conflict with tapis --version. Closes 313
* Implemented support for setting and unsetting default systems

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* Removed codepaths using GitPython for now