ePSIC-DLS/ParticleSpy: v0.5.0

This is a minor release that adds the following new functionality:

• Bug fixes including: adding all parameters to particle saving and loading, updates for compatibility with latest scikit-image version.
• Added erosion step to watershed process.
• Added the ability to extract particle images without any background (only pixels associated with particle).
• Added plotting of 3 properties in a 3D scatter plot.
• Added Niblack and Sauvola segmentation algorithms.
• Changed clearing of borders to happen after watershedding to allow greater number of particles to be included when near to image border.

Changes in this release can be tracked at https://github.com/ePSIC-DLS/ParticleSpy/pulls?q=is%3Apr+milestone%3Av0.5.0+is%3Aclosed