How to create vocabulary page? I want want to create page for vocabulary. I mean not vocabulary term, but vocabulary name.

mysite.com/myvocab


rather than 

mysite.com/myvocab/term


That page should also have possibility to display text (how can I add text field to vocabulary and not vocab term?)

Thanks!
There is two simple way to do it I think : 


Use Vocabulary module which gives you the taxonomy/vid page.
Or Use views to create your page. Create a taxonomy type view and add Taxonomy vocabulary: Vocabulary ID or Taxonomy vocabulary: Machine Name as argument.
If you want to display the nodes related to vocabulary then I think you need to use Views Field View with 2nd option.