[MRG] Make matplotlib optional (#190)

* Rename png files

* Convert plot to PlotMethods class and update docs

* Update test

* Update setup.py and docs

* Refactor PlotMethods

* Make matplotlib optional

* Raise ImportError in cli
This commit is contained in:
Vinayak Mehta authored and GitHub committed 2018-11-02 23:16:03 +05:30
1 parent c0e9235164
commit db3f8c6897
15 files changed
+236 -225

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