Laserchicken

Added
- Features added:
- max_intensity
- min_intensity
- range_intensity
- mean_intensity
- std_intensity
- coeff_var_intensity

Changed
- Features renamed:
- max_norm_z --> min_normalized_height
- min_norm_z --> max_normalized_height
- range_norm_z --> range_normalized_height
- mean_norm_z --> mean_normalized_height
- std_norm_z --> std_normalized_height
- coeff_var_norm_z --> coeff_var_normalized_height
- density_absolute_mean_norm_z --> density_absolute_mean_normalized_height
- entropy_norm_z --> entropy_normalized_height
- kurto_norm_z --> kurto_normalized_height
- skew_norm_z --> median_normalized_height
- var_z --> skew_normalized_height
- perc_1_norm_z --> var_normalized_height
- perc_100_norm_z --> perc_1_normalized_height

Added
- Percentiles 1-100
- Percentiles normalized height 1-100
- Band ratio feature extractor
- Function to list available feature extractors
- Tutorial notebook

Changed
- Echo ratio no longer gives percentage (removed factor 100)

Fixed
- Bug in reading ply file with comments in unexpected format
- Bug in normal vector and slope

Removed

Added
- Normalization module
- General tests that all current and future feature extractors will be checked against.
- Possibility to have a randomly subsampled (fixed) number of neighbors (eg for faster feature calculation)
- Added feature extractors based on normalized height

Changed
- Many feature calculations are done in a vectorized way
- z_entropy feature renamed to entropy_z for consistency
- density_absolute_mean feature renamed to density_absolute_mean_z for consistency
- perc_10 features renamed to perc_10_z for consistency

Fixed
- Corner cases for many feature extractors (e.g. zero points)
- Bug in slope feature calculation
- Bug in fix density absolute mean feature calculation

Removed