Resolve "Rename jpp -> daq"

Closes #11 (closed)

examples/plot_example.py

 """
-Reading DAQ Data (Jpp)
-======================
+Reading DAQ Data
+================
 
 The following example shows how to access hits in a ROOT file which is coming
 from the detector and written by the `JDataWriter` application.
+
+Such a file is usually called "KM3NET_00000001_00000002.root", where the first
+number is the detector ID and the second the run number.
 """
 import km3io
 
@@ -13,7 +16,7 @@ import km3io
 # Just pass a filename to the reader class and get access to the event tree
 # with:
 
-events = km3io.JppReader("samples/jpp_v12.0.0.root").events
+f = km3io.DAQReader("samples/jpp_v12.0.0.root")
 
 #####################################################
 # Note that only some meta information is read into memory.
@@ -21,4 +24,4 @@ events = km3io.JppReader("samples/jpp_v12.0.0.root").events
 # Printing it will simply tell you how many events it has found. Again, nothing
 # else is read yet:
 
-print(events)
+print(f.events)