* [patch:lib] Rework preprocessing module (#75)

* Rework sequentia.preprocessing

* Remove Test.ipynb

* [patch:docs] Update README.md (#76)

* [patch:pkg] Clean up package imports (#77)

* [release] 0.7.0a1 🎉 (#78)

* [patch:ci] Fix pomegranate to v0.12.0 (#79)

* [add:lib] Add (de)serialization support for all classifiers (#80)

* Finish tests for HMM and HMMClassifier

* Finish serialization documentation

* Ensure no NaNs in tests

* Ensure Nans in HMM.test_as_dict_with_nan

* Ensure NaNs in HMM.test_as_dict_with_nan

* Ensure NaNs in HMM.test_as_dict_with_nan

* Remove HMM NaN serialization test

* [patch:docs] Finish preprocessing documentation and tests (#81)

* [patch:lib] Simplify package imports (#82)

* [patch:docs] Fix HMM topology documentation typo (#83)

* [patch:lib] Remove nested helper functions in DTWKNN.predict() (#84)

* [add:lib] Add strict left-right HMM topology (#85)

* [patch:lib] Fix strict left-right topology serialization (#86)

* [add:lib] Implement GMM-HMMs (#87)

* Implement GMMHMMs

* Fix strict left-right topology serialization for GMMHMM

* Finish GMMHMM documentation

* Finish GMMHMM documentation

* Fix GMMHMM.as_dict method reference typo

* Validate stored models before deserialization

* Finish GMMHMM tests

* Update README

* Attempt to fix randomness in HMM and GMMHMM tests

* [add:lib] Implement custom, uniform and frequency-based HMM priors (#88)

* Implement custom HMM classification priors

* Fix custom priors for MAP classification

* Fix HMMClassifier specs

* Move README image

* Fix randomness in HMMClassifier tests

* [patch:tests] Fix GMMHMM NaN errors in tests (#89)

* [add:lib] Implement distance-weighted DTW-kNN predictions (#90)

* Implement distance-weighted DTWKNN

* Update README.md

* [patch:lib] Rename DTWKNN to KNNClassifier (#91)

* Rename DTWKNN to KNNClassifier

* Fix HMM test_load_dict

* [patch:lib] Fix issues with KNNClassifier deserialization (#93)

* Release v0.7.1

# Conflicts:
#	docs/conf.py