Bug Fixes and Other Changes
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* In Saliency and Gradcam, support seed_input that don't have samples (batch) dimension.
* Fixes a lot of bugs
* Dockerfiles changed to tensorlfow image base.
* Added tests and .travis.yml .
Breaking Changes
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* `tf_keras_vis.utils.losses.SmoothingLoss` class renamed to `tf_keras_vis.utils.losses.SmoothedLoss`.