Merge branch 'master' into develop
Added support for round names like Final, 2nd round etc.

Added new competitors into cli.py for better demonstration of new
functionality, modified view calling for new methods for support this
feature.
Modified tennis example for using this feature. Changes in view and
controller.
Main changes for this feature is in model in tournaments.py in
SingleEliminationTournament class. There are some new methods and
properties (__fraction_info etc.).
Merge branch 'feat-3' into develop
Added release notes and updated README.

Close #3.
Merge branch 'develop'