Fixes #819. Update ua-parser to 0.5.0.

[miketaylr]

This will fix the broken detection of Firefox tablets as Android browser. However, they will be identified as Firefox Mobile.

r? @karlcow

[karlcow]

With 💖. Thanks.

[miketaylr]

For the history books, this updated fine locally -- but totally broke production for about 10 minutes. 💣

I assume version 0.51 will fix this: ua-parser/uap-python#34

I don't have the error in front of me (I didn't think to copy it down), but installation was failing because it was looking for the regexes.yaml inside a uap-core directory that wasn't there (it was inside ua_parser, iirc).

These are the commands I used to fix it, from bash history:

1992  git clone [email protected]:ua-parser/uap-core.git
 1993  ls
 1994  mv uap-core/ webcompat.com/build/ua-parser/
 1995  sudo mv uap-core/ webcompat.com/build/ua-parser/
 1996  ls
 1997  cd webcompat.com/
 1998  sl
 1999  ls
 2000  sudo pip install ua-parser

[miketaylr]

(lol @ sl)