Add '--conflict' option to git-p4 subcommand to specify what action
to take when conflicts are found during 'p4 submit'.
* pw/p4-submit-conflicts:
git-p4: add submit --conflict option and config varaiable
git p4: add submit --prepare-p4-only option
git p4: add submit --dry-run option
git p4: accept -v for --verbose
git p4: revert deleted files after submit cancel
git p4: rearrange submit template construction
git p4: test clean-up after failed submit, fix added files
git p4: standardize submit cancel due to unchanged template
git p4: move conflict prompt into run, add [q]uit input
git p4: remove submit failure options [a]pply and [w]rite
git p4: gracefully fail if some commits could not be applied
git p4 test: remove bash-ism of combined export/assignment