Replace author-is-committer with committer #93
Description
The author-is-committer option relies on you setting up the git repository manually and making sure you have the correct local git config --local user.name and git config --local user.email settings. This is fine but should be either documented or replaced with a more general option such as committer.
If the committer is specified as blank or a special keyword default then we will load the committer name from Git, otherwise we will use the committer name that is specified in the config file or on the command line in the committer option, e.g. committer="Accurev Conversion Script <[email protected]>".
This would be a more powerful method of configuring the script than the existing boolean field.