Merge branch 'pw/p4-docs-and-tests'

* pw/p4-docs-and-tests: git-p4: document and test submit options git-p4: test and document --use-client-spec git-p4: test --keep-path git-p4: test --max-changes git-p4: document and test --import-local git-p4: honor --changesfile option and test git-p4: document and test clone --branch git-p4: test cloning with two dirs, clarify doc git-p4: clone does not use --git-dir git-p4: introduce asciidoc documentation rename git-p4 tests