Added documentation dependencies to requirements.txt.
Added documentation dependencies to requirements.txt.

cheral/orange3,kwikadi/orange3,qusp/orange3,marinkaz/orange3,cheral/orange3,qPCR4vir/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,qusp/orange3,kwikadi/orange3,qPCR4vir/orange3,qPCR4vir/orange3,marinkaz/orange3,marinkaz/orange3,cheral/orange3,qPCR4vir/orange3,marinkaz/orange3,kwikadi/orange3,kwikadi/orange3,qPCR4vir/orange3,qusp/orange3,marinkaz/orange3,qusp/orange3,kwikadi/orange3,cheral/orange3,marinkaz/orange3,kwikadi/orange3