Curvesimilarities

Added

**Integral Fréchet distance (`curvesimilarities.integfrechet`)**

- Integral Fréchet distance `ifd()` and its optimal warping path `ifd_owp()`.

Added

**Dynamic time warping (`curvesimilarities.dtw`)**

- Dynamic time warping distance `dtw()`, its accumulated cost matrix `dtw_acm()` and its optimal warping path `dtw_owp()`.

Changed

**Fréchet distance (`curvesimilarities.frechet`)**

- Parametric search tolerance of `fd()` is now the machine epsilon of float64.

Added

**Fréchet distance (`curvesimilarities.frechet`)**

- (Continuous) Fréchet distance `fd()`.
- Discrete Fréchet distance `dfd()`.