ports/184979: [MAINTAINER] www/piwik: update to 2.0

[Hans Fredrik Nordhaug]

This is the third time I'm trying to respond. (The two first tries was
from work - using a mail server located under himolde.no.)

I'm always using "port test" before submitting port update. I even updated 
to "Port Tools 0.99_11", but still the missing dirrm wasn't reported.
Argh. 

Anyway, feel free to add the missing dirrm to pkg-plist.

Regards,
Hans Nordhaug