Faster-coco-eval

- [x] Add CED MSE curve
- [x] Review tests
- [x] Review **COCOeval_faster.math_matches** function and **COCOeval_faster.compute_mIoU** function

- [x] Worked out the ability to work with skeletons and various key points
- [x] `eval.state_as_dict` Now works for key points

- [x] Change comparison to colab_example
- [x] append utils with opencv **conver_mask_to_poly** (extra)
- [x] append **drop_cocodt_by_score** for extra eval

- [x] **breaking change** | new static function COCO.load_json
- [x] new curve f1_confidence with `cur.plot_f1_confidence()`
- [x] **breaking change** | replace display_matrix arg `in_percent` to `normalize`
- [x] **breaking change** | rework draw functions

- [x] append Auto-formatters
- [x] append py36 support
- [x] append pandas to requirements for plotly\[express\]
- [x] update mask api with pycootools

- [x] append Plotly fig return
- [x] append preview GT only func. Without eval.

py
cocoGt = COCO(...)
preview = PreviewResults(cocoGt, iouType='segm')
preview.display_tp_fp_fn(data_folder=..., image_ids=..., display_gt=True)