Write upgrade path from Submenu Tree 7.x-1.x to 7.x-2.x

Submenu Tree 7.x-2.x provides a much larger set of permissions than Submenu Tree 7.x-1.x.

In 7.x-1.x, "administer submenu tree settings" would allow a user to change all settings related to sub content. In 7.x-2.x, "administer sub content" simply allows for a user to enable/disable sub content (and not change any sub content settings).

We should probably be nice to people who use the Submenu Tree module ;) and automatically migrate all of their user roles with Submenu Tree 7.x-1.x permissions to the equivalent 7.x-2.x level of permissions.

I'm going to assume that administrators would want anyone who can currently edit any sub/sibling content settings to continue to be able to do so, so we would translate:

• administer submenu trees

to

• administer sub content
• administer sub content title
• administer sub content display type
• administer sub content weight