v0.5.0

• DDSketch now accepts negative values and maintain a store for negative values in addition of the one for positive values, which is how SignedDDSketch worked. SignedDDSketch has been removed.
• Preset sketch factory methods have been moved to DDSketches. The ones in DDSketch have been deprecated.
• A paginated store has been added (see #30). For some distributions of input values, especially multimodal ones, it can reduce the memory footprint of the sketch.
• Add QuantileSketch.clear() to make the sketch empty while keeping using already allocated memory.
• Fix a bug in the serialization of BitwiseLinearlyInterpolatedMapping.