Segmentation overay

[lullulalal]

exact-browser-sync.js

• Display the segmentation images list.
• Split the segmentation overlay and registration handlers.

exact-overlay-opacity.js

• Event handlers related to the segmentation overlay.

annotate.html

• Include the newly added exact-overlay-opacity.js file.

model.py

• Modify to allow uploading .hdf5 files.

requirements.txt

• Add the h5py package
• Update Django version. In the latest version of Django, no errors occur with CharFields.