Trollius: allow version 0.2 and later

As the author of the Trollius module, I would like to use newer
versions. In version 0.2, the API changed a little bit ("yield
From(...)" instead of "yield ..."), but the change is backward
compatible (yield ...  is still accepted).

Change-Id: I65559d725f443cd2097ab09bf6a0f1adb81d1153
Merge "Trollius: allow version 0.2 and later"