* Generalized OHEM

* remove config

* update docstring

* fixed sort prob

* fixed valid_mask

* Fixed voc aug convert

* update getting_started.md

* add class balanced doc

* add badge

* Created using Colaboratory

* add read docs

* Fixed readthedocs

* fixed colab ref

* add readthedocs.txt

* add link

* fixed modelzoo link

* add missing reference

* fixed docs

* remove relative path in docs

* add colab in README.md

* update docker image

* add newline

* fixed br