Revert "Change chruby version in powconfig"

This reverts commit 6b7e80e87895eaec8c3b4f3914e3b82aa187e398.

Conflicts:
	powconfig
Revert "Complete the switch to chruby"

This reverts commit 87ae3fa8b470f5611fffa43e4c619baa0ad76569.

Conflicts:
	powconfig
	vim/vundles.vim
	zshrc
Back to rbenv