matplotlib over apt instead of pip for travis
matplotlib over apt instead of pip for travis

MDPvis/rlpy,MDPvis/rlpy,imanolarrieta/RL,MDPvis/rlpy,BerkeleyAutomation/rlpy,rlpy/rlpy,BerkeleyAutomation/rlpy,silgon/rlpy,imanolarrieta/RL,rlpy/rlpy,imanolarrieta/RL,silgon/rlpy,rlpy/rlpy,silgon/rlpy,BerkeleyAutomation/rlpy