Forcing UTF-8 encoding and adding support for 'with' clause

[ghost]

Hello,

1. I've found when I try and import an entry from a database that contains the 'ü' character I get a 'from ASCII-8BIT to UTF-8' error. I have added a fix for this by forcing the 'UTF-8' encoding.
2. I've also added code that supports the sql 'WITH' clause.

Thank you.

[thbar]

Hi! Thanks for your patch first, appreciated :)

Are you able to provide a working test for 9ef0ffd and 2cc25e1? I could merge it right away!

On 081ae88: I won't apply this one for the following reasons:

• one can use force_encoding at the row level without us making any assumption
• force_encoding doesn't work with 1.8.7
• some people are outputting data in latin1 or other encoding

Hope you're ok with this! (but thanks anyway)

-- Thibaut