tox doesn't evaluate minversion from config before attempting to parse full config

[pytoxbot]

• Bitbucket: https://bitbucket.org/hpk42/tox/issue/317
• Originally reported by: @nakato
• Originally created at: 2016-02-29T02:14:22.850

If a user defines a minversion greater than that which is installed which fixes/uses syntax that the installed version of tox cannot parse, tox bails with a stack trace rather than exiting with an error telling the user their tox is too old.

Tox should check the minversion prior to attempting to parse the remainder of the config file.

[pytoxbot]

Original comment by sallner

The issue was closed by the merge of pull request #190. Thanks @nakatoio

[pytoxbot]

Original comment by @nakato

Ref patch 190