Add acoustics monitoring

I do not know if I'm doing the right thing. I tried to upload the script "acoustic.py" and I am asked to send a merge request. Is this the correct procedure? @tgal Thank you

scripts/acoustics.py

@@ -9,7 +9,7 @@ Usage:
 
 Options:
     -d DET_ID       Detector ID
-    -ndu N_DUS      Number of DUs
+    -n N_DUS        Number of DUs
     -o PLOT_DIR     The directory to save the plot 
     -h --help       Show this screen.
 
@@ -22,7 +22,7 @@ import os
 import matplotlib
 from matplotlib import colors
 from datetime import datetime
-
+from docopt import docopt
 import km3pipe as kp
 
 
@@ -197,9 +197,9 @@ while check:
     iAB2 = np.intersect1d(iAB2_up, iAB2_down)
     iAB3 = np.where(ind[0] > (2*L - 1))
     
-    colorsList = [(0, 0, 0),(1, 0.3, 0),(1, 1, 0),(0.2, 0.9, 0)]
+    colorsList = [(0, 0, 0), (1, 0.3, 0), (1, 1, 0), (0.2, 0.9, 0)]
     CustomCmap = matplotlib.colors.ListedColormap(colorsList)
-    bounds=[-2, -1, 0, 1, 2]
+    bounds = [-2, -1, 0, 1, 2]
     norma = colors.BoundaryNorm(bounds, CustomCmap.N)
     for du in range(N_DUS):
         for ab in range(N_ABS):