Defines MacPorts aliases and adds MacPorts directories to path variables.

• portc cleans the files used to build ports.
• porti installs a port.
• ports searches for a port.
• portu upgrades a port.
• portU upgrades MacPorts, the ports collection, and outdated ports.
• portx uninstalls a port.
• portX uninstalls inactive ports.

The authors of this module should be contacted via the issue tracker.

• Matt Cable
• Sorin Ionescu