pkg_patch status

[Ivan Voras]

Basically finished the main part of the project. There are a few
things that need to be done before I can issue a call for testers:

- more internal testing, investigate some edge cases I've encountered
- finish the man page
- see if anything needs to be done to make the whole thing work on
recent CURRENT
- write up usage instructions on the wiki page.

http://wiki.freebsd.org/IvanVoras/pkg_patch