just added a warning if daq not found, instead of jus printing

ADoutputs.py

@@ -5,7 +5,8 @@ Created on Wed May 30 15:27:17 2018
 @author: martindrech
 """
 
-from __future__ import absolute_import, division, print_function
+#from __future__ import absolute_import, division, print_function
+import warnings
 
 daqfound = True
 
@@ -20,7 +21,7 @@ try:
     ao_range = ULRange.BIP10VOLTS
 
 except:
-    print('import error: mcculw not installed. In linux this might not be available. ')
+    warnings.warn('Warning: either the daq was not found, or there was some error with the mcculw drivers. ')
     daqfound = False
 #%%