pillow==2.5.3
mock==1.0.1
sympy==0.7.6
pillow==2.5.3
mock==1.0.1
sympy==0.7.6
matplotlib>=1.4.3

Add matplotlib to optional req.
Add matplotlib to optional req.


Former-commit-id: 566f7cbb7b151ebc62735c3504a9eab39be4a060 [formerly b304489d0adebe70c5d25812980d670deb8ff491]
Former-commit-id: 978f80cab2b33269857918295105e9f256380e82