global: pre-release improvements

* Improves single page documentation.

* Makes docstring according to PEP257 standard.

* Adds support for tox and pytest.

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Flask-Breadcrumbs v0.2.0

Signed-off-by: Jiri Kuncar <jiri.kuncar@cern.ch>
Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
version: post-release version bump

Signed-off-by: Tibor Simko <tibor.simko@cern.ch>
global: order argument addition

* Allows usage of ordered breadcrumbs as menu. (PR #15)

Reviewed-by: Jiri Kuncar <jiri.kuncar@cern.ch>