log rebuilding, random refactoring, work in progress please wait for an OK commit before to use this version

DEBUG RELOAD implemented, and test-redis.tcl modified to use it to check for persistence consistency.

ae.c now supports multiple polling API modules, even if only ae_select.c is implemented currently. Also adding and removing an event is now O(1).

benchmarking with different number of LRANGE elements. Ability to change the glue output buffer limit by #define

support for writev implemented but currently ifdef-ed in order to understan why I can't see the improvements expected. Btw code provided by Stefano Barbato

appendfsync parsing in config file fixed. If you benchmarked Redis against different appendfsync options is time to try again ;)