Update to version 1.4

Changelog:
upgrade-base:

• pass only needed variables to make, sudo -E passes too many causing various build errors

upgrade-ports:

• improve distfile fetching code
• try to resolve plist conflicts by removing culprit package when it is already marked for reinstallation - this resolves most of the problems
• implement multiprocess upgrade order queue sorting
• checking for missing dependencies is now multi process operation making it a lot more efficient and faster
• don't offer to reinstall packages marked as locked
• make conflict detection multi process operation
• on reinstall detect when package is to be upgraded or downgraded, include this information in summary for user consideration
• remove recursively conflicting packages on plist install error
• implement dialog interface for interactive package selection
• make pkg command validation more strict to avoid false positives