Openfisca-extension-template

- Technical change
- Details:
- Tests library against its packaged version
- By doing so, we prevent some hideous bugs

_Note: the 1.1.5 version has been unpublished as it was used for test analysis_

- Add continuous deployment with CircleCI, triggered by a merge to `master`
branch

- Declare package compatible with OpenFisca Country Template v3

- Technical improvement:
- Details:
- Adapt to version `21.0.0` of Openfisca-Core and version `2.1.0` of
Country-Template

- Technical improvement:
- Details:
- Adapt to version `20.0.0` of Openfisca-Core and version `1.4.0` of
Country-Template

- Technical improvement: adapt to version `17.0.0` of Openfisca-Core and
version `1.2.4` of Country-Template
- Details:
- Transform XML parameter files to YAML parameter files.
- Gather tests in the directory `tests`. The command `make test` runs only
the tests contained in that directory.
- Add a changelog.

Example Entry