Add DEBUG flag to print git command-lines
Add DEBUG flag to print git command-lines

It can be convenient to see exactly which git commands are being issued
by the script.  The DEBUG flag can be set to True to display the
underlying git commands.

Signed-off-by: Stefan Hajnoczi <484520986196e4a799496429ce8a499eb6488adb@gmail.com>

stefanha/git-publish,stefanha/git-publish