Certgenerator

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Add options f to force to overwrite existing csr or p12

- Update certificate.py
* Add param 'force' to functions: generate_csr(), generate_multiple(), generate_p12(), generate_mumtiple_p12()
* Add functions: overwrite_csr(), write_csr(), overwrite_p12(), write_p12()
- Update cli.py
* Add param 'force' to functions: create(), create_multiple(), create_p12(), create_mumtiple_p12()
- Update decorators.py
* Add option --force to decorator global_options()
- Improve README

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- Improve README

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- Improve README

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- Update confg
* Get yaml file => self.yaml_file = os.path.join(self.here, "csr.yaml")

- Update certificate.py
* Change default import yaml

- Update cli.py
* Add -V to display version cert -V
* Edit command cert config read => display csr.yaml
* Add command cert config edit-yaml to edit csr.yaml

- Update decorators.py
* Update decorator folder_options() => add option (-y, --yaml) to edit yaml file

- Update tools.py
* Import and init yaml from package ruamel.yaml
* Add copy csr.yaml in edit_config_file()
* Add function tools.add_config_file() to copy csr.yaml in folder app
* Edit function edit_config() => add parameter _yaml to edit yaml file

- Update setup.py
* add ruamel.yaml to install_requires

- Improve README

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- Update config
* catch IOError: Permission Denied when edit config.ini

- Update certificate.py
* Upgrade code

- Update tools.py
* Upgrade code
* change mode of app drectory to 0777 is cli is launch with sudo
* don't create app folder or csv file in failed to write in config.ini
* change mode of app drectory to 0777 is cli is launch with sudo

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- Update tools.py
* bug correction => catch TypeError