Begin to use python logging framework. Remove if quiet < bla logic and instead use...

Begin to use python logging framework.  Remove if quiet < bla logic and instead use loglevels (critical, error, warn, info, debug).  Default to WARN for repoman, which will print CRITICAL, ERROR, and WARN messages.  one -v will print INFO messages and two -v's will print DEBUG messages, each -q will reduce the loglevel by one.  -q and -v can be given in any order.

svn path=/main/trunk/; revision=8250