Koji 1.7.0 release

[Mike McLean]

I've just tagged and posted the 1.7.0 release of Koji. The most 
significant change is the move from mod_python to mod_wsgi, but there 
are a number of other changes also (it's been a while since 1.6.0).

I've written a document for migrating from 1.6.0 to 1.7.0. Look under:

   docs/Migrating_to_1.7.txt

Here is the changelog entry:
* Thu May 31 2012 Mike McLean <mikem at redhat.com> - 1.7.0-1
- mod_wsgi support
- mod_python support deprecated
- kojiweb configuration file (web.conf)
- split storage support (build volumes)
- configurable resource limits (hub, web, and kojid)
- drop pkgurl in favor of topurl
- better approach to web themes
- more helpful policy errors
- clearer errors when rpc args do not match function signature
- avoid retry errors on some common builder calls
- don't rely on pgdb._quoteparams
- avoid hosts taking special arch tasks they cannot handle
- kojid: configure yum proxy
- kojid: configure failed buildroot lifetime
- kojid: literal_task_arches option
- support for arm hardware floating point arches
- maven build options: goals, envs, extra packages
- store Maven build output under the standard build directory
- make the list of files ignored in the local Maven repo configurable
- add Maven information to taginfo
- make kojira more efficient using multicalls and caching
- speed up kojira startup
- kojira: configurable sleep time
- kojira: count untracked newRepo tasks towards limits
- kojira: limit non-waiting newRepo tasks
- gssapi support in the messagebus plugin
- grant-permission --new
- improved argument display for list-api command
- moshimoshi
- download task output directly from KojiFilesURL, rather than going 
through getfile
- option to show buildroot data in rpminfo command
- show search help on blank search command
- wait-repo: wait for the build(s) to be the latest rather than just present