Version bump to 1.12

Bump version for new features. (undeploy/skip/unskip/automodman)

Suppress certificate errors from wget prior to 1.14. Fixes colinmolle…

…nhour#57

Always use relative symlinks even with symlinked destination.

Added link to modman.php port.

Fix another regression to update-all command.

Fix custom functions for BSD. Refs colinmollenhour#42

Do not use relative paths for symlinks when the location of the symlink

is within a symlinked path.

Add support for a custom clean script.

Give some attention to --copy option. Fixes colinmollenhour#28