Merge branch 'remove_matplotlib' into 'master'

try/except around matplotlib import

See merge request !39

wetb/prepost/misc.py

@@ -31,7 +31,10 @@ import scipy as sp
 from scipy import optimize as opt
 from scipy import stats
 from scipy.interpolate import griddata as interp
-from matplotlib import pyplot as plt
+try:
+    from matplotlib import pyplot as plt
+except:
+    pass
 import pandas as pd