Add the die() helper function.
Move portage manipulation into its own function
Add informational messages and error checking.
Relocate the portage tree into /var/portage/tree and adjust accordingly.
Add bind mount support for the portage tree (from the host)
Document this shiny new feature.
Relocate the portage temporary directory.
Move builds to tmpfs
Merge pull request #56 from specing/portage

Portage rework