Ticts

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* Be permissive on division with zero as default

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* Update Readme
* Create TictsMagicMixin for builtin nethods of TimeSeries
* add it
* Linting
* Rework it, no longer inherit from SortedDict
* add test on values
* First implementation

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* Small fix on div

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* Precise which super for equals

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* Render testing available at ticts package place

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* Re-organize code
* Add extensions to pandas objects 'to\_ticts'
* Fix sphinx doc building
* Add io to\_json / from\_json