Add a debug option
Add failing test (generate absolute paths)
Add support for absolute paths

When using a command such as cookiecutter /path/to/template,
Jinja would raise an error complaining that the template file was not
found.
Merge branch 'absolute-paths' of git://github.com/krallin/cookiecutter into krallin-absolute-paths

Conflicts:
	cookiecutter/main.py
Rename and add tests utils.chdir -> utils.work_in
Merge branch 'absolute-paths' of git://github.com/krallin/cookiecutter into krallin-absolute-paths
Add docstring. 4 spaces for consistency.