APS-39 feature: Add auto-versioning for roll
APS-39 feature: Provide default VENDOR
APS-39 feature: Update .gitignore
APS-39 feature: Pass VENDOR to lower levels
Merge pull request #1 in APS/hdf-roll from feature/APS-39-minor-hdf-roll-updates to master

* commit 'a96e1d57d21ab03914b1511e4b1175ea333e3645':
  APS-39 feature: Pass VENDOR to lower levels
  APS-39 feature: Update .gitignore
  APS-39 feature: Provide default VENDOR
  APS-39 feature: Add auto-versioning for roll