Resolve "documentation NEW API"

Closes #2230

See merge request !1879

don't remove layer together with line

See merge request !1881

Merge branch '1657-annotating-should-be-a-separate-job-that-can-be-run-at-any-time' into 'development'

Resolve "annotating should be a separate job that can be run at any time"

Closes #1657

See merge request !1874

missing sbgn flag added to response

See merge request !1880

Resolve "missing relation to layer in line response"

Closes #2238

See merge request !1878

Resolve "support for sbgn look in vectorization"

Closes #2232

See merge request !1877