Rename swh.web.common module to swh.web.utils

docs/developers-info.rst

swh/web/add_forge_now/api_views.py

swh/web/api/apidoc.py

swh/web/api/apiresponse.py

swh/web/api/apiurls.py

swh/web/api/throttling.py

swh/web/api/utils.py

swh/web/api/views/content.py

swh/web/api/views/directory.py

swh/web/api/views/graph.py

swh/web/api/views/identifiers.py

swh/web/api/views/metadata.py

swh/web/api/views/origin.py

swh/web/api/views/raw.py

swh/web/api/views/release.py

swh/web/api/views/revision.py

swh/web/api/views/snapshot.py

swh/web/api/views/stat.py

swh/web/api/views/utils.py

swh/web/api/views/vault.py