generate and import

Hi again,
 Changes to generate:
  - added sha1 checksums as an option (-s sha)
  - fixed the generation exception so it actually prints the raised
error string :)

I'm pretty content with the generation script. I'll wrap a package
around it and maybe a man page and post it for people to play with.

 
 Changes to import:
 - added packageObject.RPMObject.inPrcoRange()
   so I can ask: is foo > 1:1.1-1 in the range of provides for this
package
 - cleaned up packageObject.RPMObject.checkPrco()
 - added some fixme's for consideration for later
 - tested import with multiple repositories and completely duplicate
repositories - works fine.

import times are staying fairly static right now. All of FC1 binary rpms
for x86 are taking 12s to import the primary on a p3-933 - that's 1467
rpms. Curiously all of the srpms for FC1 x86 only takes 4s to import and
there are 875 of them. :)

-sv