Updated the calendar plugin.

After weeks and a single reply in the forums i found out my plugin was rubbish. You couldn`t use it if you didn`t have a custom post type named `agenda`. And that in a calender plugin is weird. And so i heard. So i looked at the code again and fixed that problem. So 0.1.1 was created.

Only to find out looking at the code that it needed tweeks. So i did and now i think my calendar plugin will work out of the box like it should. So 0.1.2 was born. Now we can go on.