Correcting logformat

The log format is outputted with the number of days in the month, instead of the actually day.

So for example the log for today has the following entries:
[31.Jan.14 12:10:50] <Bot to server> PRIVMSG


t	Number of days in the given month
d	Day of the month, 2 digits with leading zeros
Merge pull request #13 from renini/patch-1

Correcting logformat