Add filtration support

[reds-heig]

Reference Issues/PRs

16

What does this implement/fix? Explain your changes.

• Implements support for the different filtrations supported by flagser
• Fix disabling of std::cout which was disabled until the programs ends :cry:
• Clean setup.py unnecessary installation of pybind11

Any other comments?

Add check of filtration if both bindings and python code for available filtrations.

[ulupo]

/azp run

[azure-pipelines[bot]]

Azure Pipelines successfully started running 1 pipeline(s).

[MonkeyBreaker]

filtration : string, optional, default: `'max'`
        Algorithm determining the filtration. Warning: if an edge filtration is
        specified, it is assumed that the resulting filtration is consistent,
        meaning that the filtration value of every simplex of dimension at
        least two should evaluate to a value that is at least the maximal value
        of the filtration values of its containing edges. For performance
        reasons, this is not checked automatically.  Possible values are :
            ['dimension', 'zero', 'max', 'max3', 'max_plus_one', 'product',
            'sum', 'pmean', 'pmoment', 'remove_edges', 'vertex_degree']

Is it better this way ?

[ulupo]

@MonkeyBreaker typo in "dtermining", also what I meant is to write 'max' (including the string characters) surrounded by double ticks.

[MonkeyBreaker]

Sorry for the type, i edited previous message

[ulupo]

And take care of the linting after "are: ".

[ulupo]

Double ticks, please. Single ticks are displayed differently by sphinx (they make things look italic).