M3-cli

* Renamed `describe-aws-stack-events` command to `describe-events`, because it can describe events for different clouds
* Changed parameter `--full_help` to `--full-help` for complete help message
* Fixed the picture (red square) in README.md
* Added .creds directory in .gitignore file
* Updated the pictures (usage_sample) in README.md file
* Added the `api_param_name` field in the command parameters in the file `commands_def.json`. Its replaced the original name of the parameters in `commands_service.py` with the server parameters `api_param_name` when sending a request to the server
* The names of the command's parameters reduced to one single form with m3admin's commands
* Sorting templates in `terraform-describe-template` command is no longer case-sensitive

* Removed obsolete command `multiproject-report`

* Updated cryptography module version due to unstable OS backward compatibility: 3.1.1 -> 3.4.7

* Renamed the following commands:
* `update-tag` to `set-public-tag`
* `set-tag` to `set-private-tag`
* `delete-tag` to `delete-private-tag`
* `describe-tags` to `describe-private-tags`
* If the response is more than 70 characters long, it will be split for better readability
* Reworked `create-keypair` default command output to tabular
* Reworked `createdDate` param in `describe-images` command from time stamp to human-readable IS0-8601
* Reworked format the number of decimals to print out only two decimal places
* Command `management-console` allowed only for AWS, AZURE, GCP clouds
* Renamed the following parameters:
* `memory` to `memoryGb` in `describe-shapes` command
* `maxSize` to `maxSizeGb` in `get-volume-quota` command

* Fixed `describe-schedules` command - now it describes all schedules, not just the first one in the list
* Renamed parameters of the `create-schedule` command:
* `--tag_value` to `--tagValue`
* `--tag_key` to `--tagKey`
* The `--tagValue` and `--tagKey` parameters are now required for schedule type "My instances with tag"
for `create-schedule` command

* Fixed creating request for `mreport` command