add Install with PPA
update Makefile

- Better support for building Debian package.
- Fix bash completion for systems that have dash as default shell.
fix typo in profile wrapper
bring makefile closer to supporting debian packaging
update README.md
switch to GPLv2 since that is what Git uses
separate documentation
add target for generating man page
install man page
move doc install to separate target
version bump
depend on git-bd.md
include man page in source
remove clean
add -f option to suppress confirmation prompts
add init example to usage
add test
add Travis CI config
add sudo
must set user.email and user.name