Description of problem:
when pup detects an error when initializing it displays message and exits. it
should try do tell what exactly has failed.

Version-Release number of selected component (if applicable):
pirut-1.0.3-0.fc5

How reproducible:
run pup with yum repos with unreachable server

Steps to Reproduce:
1. select some unreachable server for one of the enable yum repos
2. run pup
  
Actual results:
pup will display generic error message

Expected results:
pup should display descriptive error message