Merge branch 'master' of https://gitlab.pasteur.fr/odoppelt/iPPIDB

ippisite/ippidb/forms.py

ippisite/ippidb/static/css/ippidb.css

...db/static/images/PPITypes/Inhibited/Customyourown_Apo.png

...b/static/images/PPITypes/Inhibited/Customyourown_Holo.png

...b/static/images/PPITypes/Stabilized/Customyourown_Apo.png

.../static/images/PPITypes/Stabilized/Customyourown_Holo.png

...db/static/images/PPITypes/Stabilized/Hetero2-merABApo.png

ippisite/ippidb/templates/PDBForm.html

ippisite/ippidb/templates/ProteinDomainComplexTypeForm.html

ippisite/ippidb/templates/ProteinForm.html

ippisite/ippidb/views.py