v0.3.0

What's Changed

• Add Attributor to compute gradient by @chr5tphr in #28
• SmoothGrad by @chr5tphr in #29
• Added IntegratedGradients by @chr5tphr in #30
• Occlusion Attributor by @chr5tphr in #31
• Backprop Approaches by @chr5tphr in #32
• Added a few other example composites to README by @chr5tphr in #33

Full Changelog: 0.2.1...0.3.0