Rename pre-pull and move to scripts/.
Rename pre-pull and move to scripts/.

ryanlovett/datahub,gunjanbaid/datahub,berkeley-dsep-infra/datahub,berkeley-dsep-infra/datahub,berkeley-dsep-infra/datahub,gunjanbaid/datahub,ryanlovett/datahub,ryanlovett/datahub