Redis release candidate 1

Changelog

+2009-06-16 Better handling of background saving process killed or crashed
+2009-06-14 number of keys info in INFO command thanks to Diego Rosario Brogna
+2009-06-14 SPOP documented
 2009-06-14 Clojure library thanks to Ragnar Dahlén
 2009-06-10 It is now possible to specify - as config file name to read it from stdin
 2009-06-10 sync with jodosha redis-rb

TODO

 BEFORE REDIS 1.0.0-rc1
 
  * Cover most of the source code with test-redis.tcl
- * Remove tmp-.... files when saving child exits in the wrong way, to do so use tmp-pid.rdb as filename so that the parent can rebuild the file name just from the child pid.
 
 AFTER 1.0 stable release