Flag profiles whose filesystem version is outdated.

Highlights profiles with upgrades that lead to a destination version that is higher than the corresponding profile's current filesystem version.
This usually means someone forgot to update the version in `metadata.xml` of the corresponding profile.

![flag_outdated_fs_version](https://cloud.githubusercontent.com/assets/405124/3435022/7165553a-0090-11e4-82be-1dd81d5030f5.png)

/cc @jone @maethu @phgross