Switch to a different regular expression to escape ansi colors.

[brandoncazander]

My regex-fu isn't very good, so I shamelessly stole the new regular expression from http://superuser.com/a/380778

Tested against python 2.6.9 (not working before) and 2.7.8 (working before).

Fixes #8.

[coveralls]

Coverage increased (+37.09%) to 49.01% when pulling efed148 on brandoncazander:master into 5e652d0 on skoczen:master.

[skoczen]

Awesome, thanks for this fix! I'll have cycles to review and get this out hopefully soon, (not tonight, sadly), but didn't want to leave you hanging.

Thanks for making polytester better!

Oh, can you please put your name and desired attribution in AUTHORS, as well?

Thanks,
-Steven

[coveralls]

Coverage increased (+37.09%) to 49.01% when pulling 9198168 on brandoncazander:master into 5e652d0 on skoczen:master.

[coveralls]

Coverage increased (+37.09%) to 49.01% when pulling 9198168 on brandoncazander:master into 5e652d0 on skoczen:master.

[coveralls]

Coverage increased (+37.09%) to 49.01% when pulling 9198168 on brandoncazander:master into 5e652d0 on skoczen:master.

[brandoncazander]

Thanks @skoczen!

[skoczen]

Merging this in now, release shortly!