logfile display max rows and new log option for daily summar

[disorganizer]

as the logfile tends to get rather big even if you only get stats, 2 features would be nice:

1) logfile maxrows
define how many of the latest logfile rows are displayed in the view logfile page, and create a button to access the complete logfile as download (not browser-display).
why? speed up using the admin interface

2) daily summary
this logoption would create a daily summary of the polling stats instead of a per run statistics.
why? well. not needed if 1 is implemented, but would help get a kind of feel for average polling times.
after a second thought this would even be better when gathering the statistics data inside cacti for graphing. as a kind of internal graph *g*
(#rra's, #host, #datasources, #host/process, runtime on a seperate statistics page... maybe even "poll failures" marked in red and "overtime" in orange or something like that).

[TheWitness]

No more changes to 0.8.6. New logging facility similar to Windows Event console management available in 0.9.

TheWitness