Add pyproject.toml to comply with new pip standard

See merge request !18

Remove stereo related code

See merge request !17

Remove camera member of Stream
Remove warp, stereo and reproject filters
Remove camera_config of StreamFile
Remove unit test associated with the above
Implement missing test for remaining filters

Doc fix

See merge request !16

bob.io.image dependency

See merge request !15

Remove image conversion from utils and use those from bob.io.image.utils

See merge request !14

Fix ocv bob image conversion

See merge request !13

Move non-image specific filters back to stream.py. Rename stream_filters.py to stream_image_filters.py. Add modules docstring and fix some documentation.

[DOC] Documentation of stream.py, move select and astype filters to stream_filters.py, doc fix in utils.

Unit test

See merge request !12