improved warning in case the core module is not found, corrected '/echo/' handling (had problems with key 'c/a'

lib/damask/__init__.py

@@ -54,5 +54,5 @@ except (ImportError,AttributeError) as e:
                                            'compile_CoreModule.py',
                                           ):
     sys.stderr.write('\nWARNING: Core module (Fortran code) not available, \n'\
-                     'try to run setup_processing.sh or compile_CoreModule.py\n'\
+                     "try to run 'make processing'\n"\
                      'Error message when importing core.so: %s\n\n'%e)

lib/damask/config/material.py

@@ -148,7 +148,7 @@ class Material():
 
     for line in content:
       line = line.split('#')[0].strip()                   # kill comments and extra whitespace
-      line = line.split('/')[0].strip()                   # kill comments and extra whitespace
+      line = line.split('/echo/')[0].strip()              # remove '/echo/' tags
       line = line.lower()                                 # be case insensitive
       if line:                                            # content survives...
         match_part = re_part.match(line)