BUG: Remove --find-links from the packed installer's requirements.txt
BUG: Remove --find-links from the packed installer's requirements.txt

All of the packages are included/bundled in the installer so any
extra link urls can only have a deterimental effect on installation
process.

Fixes gh-1261

cheral/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,qPCR4vir/orange3,qPCR4vir/orange3,qPCR4vir/orange3,cheral/orange3,qPCR4vir/orange3,cheral/orange3,cheral/orange3,qPCR4vir/orange3