Support types like varchar(255), try to recognize types.

[michaelkuty]

[romainr]

https://github.com/dropbox/PyHive/pull/278 might fix it too

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}