Merge everything from ssl to master

bob/ip/binseg/configs/models/m2unetssl.py

bob/ip/binseg/data/binsegdataset.py

bob/ip/binseg/engine/ssltrainer.py

bob/ip/binseg/engine/trainer.py

bob/ip/binseg/modeling/losses.py

bob/ip/binseg/script/binseg.py

bob/ip/binseg/utils/plot.py

doc/benchmarkresults.rst

doc/covdresults.rst

doc/datasets.rst

doc/evaluation.rst

doc/index.rst

doc/links.rst

doc/setup.rst

doc/training.rst

setup.py