Added default param to Sudo::Wrapper.run to reflect documentation
Patched protected class method inaccessible to instance
Restricted DRb access to localhost

(fix?) Conflicts:
	lib/sudo/wrapper.rb
Fixed inf recursion under bundler
Acknowledge R. M. Koch
fix copyright years
minor README fix
fix a previous unresolved merge conflict
add new examples/writable_root.rb
disable client listening completely

until we need it it again (DRb docs says it's necessary only for
non-marshallable objects but, in any case, we are still unable to
sudo-ize a lambda or a Proc )
remove unused/commented load_path method
fix Wrapper.run to return values
improve writable_root example