check if fin has 'name' attr

[danodonovan]

Fix so that load can load from stream file-like object (as well as regular file-like object).

import io
import pytoml
pytoml.load(io.StringIO(u"this_is = 'a_test'"))

[Ry4an]

We had to work around this assumption locally in our unit tests. Good fix.

[avakar]

Whoops, sorry, I fixed it before I noticed the pull request. Thanks!