[PATCHv3 0/4] git p4: label import/export

This is a reworked version of my earlier patches for adding improved label import/export support to "git p4", and incorporates comments from Pete Wyckoff and Junio:

Comments from Pete:

* The verbose flag has been hoisted to the Command class.
* Uses the existing functions to fish out p4 changelist numbers.
* Config options renamed to be self-consistent, and regexp
  now includes lower-case characters.

I have left the tests in t9811 where they are, so that the t9804 script can be used solely for "--detect-labels".

Comments from Junio:

* P4EDITOR is set to the always-true value in the test harness
* Treat an empty P4EDITOR the same as an unset P4EDITOR.

There was a discussion about having "git p4" fall back to a default in the same way that "p4" does, but this would change the existing behavior (use git var GIT_EDITOR) and confuse users.

This patch series was reworked against ld/git-p4-tags-and-labels and also has a very small documentation fix.

Luke Diamand (5):
  git p4: Fixing script editor checks
  git p4: Squash P4EDITOR in test harness
  git p4: Ignore P4EDITOR if it is empty
  git p4: import/export of labels to/from p4
  git p4: move verbose to base class

 Documentation/git-p4.txt       |   54 ++++++--
 git-p4.py                      |  289 ++++++++++++++++++++++++++++++++--------
 t/lib-git-p4.sh                |    1 +
 t/t9800-git-p4-basic.sh        |    4 +-
 t/t9811-git-p4-label-import.sh |  202 ++++++++++++++++++++++++++++
 5 files changed, 482 insertions(+), 68 deletions(-)
 create mode 100755 t/t9811-git-p4-label-import.sh