scheduler: Update Fenzo to newer version.
scheduler: Update Fenzo to newer version.

The previous version of this line was pointing to an ephemeral snapshot
release of Fenzo that is no longer available.

When this commit was made, the newest vesion of fenzo-core was actually,
0.11.0. However, that version is incompatible with the current version
of Cook. 0.10.0 does appear to work.

m4ce/Cook,twosigma/Cook,twosigma/Cook,m4ce/Cook,twosigma/Cook,m4ce/Cook