Fix pyqt to version 4 because of Anaconda issue with pyqt5 and matplotlib, see ContinuumIO/anaconda-issues#1068
Fix pyqt to version 4 because of Anaconda issue with pyqt5 and matplotlib, see ContinuumIO/anaconda-issues#1068

jobovy/galpy,jobovy/galpy,jobovy/galpy,jobovy/galpy