this is an extensive rewrite of the original code

this should fix a following issues

* run database updates from cron (its own process)
* no more locked databases because of previous fix
* have both edge and stable branches included
* better handling of deps and revdeps
* have a dedicated flagged section to see which pkgs are flagged
* add support for a caching reverse proxy (see proxy config options)
* and much more smaller changes...

.gitignore

@@ -1 +1 @@
-conf.lua
+config.lua