I was trying to import some elpa packages recently and found some 
issues, so here are some patches to fix them.

1. call-with-downloaded-file had behaviour different to how it was 
documented to behave. This was primarily a problem when trying to 
import packages with no description (eg. color-theme-solarized on 
melpa).

2. Package dependencies need to be propagated so that emacs can 
find them.