* Add support for URLs and directories including git clone support
* Add support for http://, https://, and ssh:// git cloning
* Add support for cloning behind proxy
* Add support for checking out references of cloned repos
* Add support for checking out references of local repos
* Add support for Pegleg Git exceptions
This patch set also adds support for including Pegleg
source code in documentation and adds exceptions
documentation.
Change-Id: I417a62c815f97a70f3abc432cc342707e8ce1f54