Add '--period' to replace '--wait', which is now obsolete.
Add '--sync-timeout' to replace '--timeout', which is now obsolete.
Both of these new flags take a Go-style time string, rather than a bare
number. For example "1s" for 1 second or "1m" for one minute.
The old flags have been kept and will take precedence if specified.
THIS IS A BREAKING CHANGE
Switch flags implementation to use pflag. This means that long flags
like `-username` must now use 2 dashes: `--username`.
The `-v` flag (verbose) used to accept `-v` or `--v`. Now it only
accepts `-v.
The `--help` and `-h` flags are new.
The `--man` flag is new (print a man-page like help message).
Several glog flags which used to be exposed (e.g. --logtostderr) are no
longer exposed. Logs always go to stderr.
* add option to NOT recursively clone submodules
* Add "shallow" and "off" modes to submodule clone
* update readme to reflect new flag
* wording and such feedback
Since the default clone path is $HOME/git and the docker image sets $HOME to /tmp, we have to mount the volume at `/tmp/git` for the container to write files to the volume. As written, the example doesn't write to the volume.
The README instructs the user to overwrite the TAG variable to set the
tag on `make container`. However, the user should actually overwrite the
`VERSION` variable.
Tim Hockin