Changes for setting default to mvstream, blizzard directories

* Moved mvstream settings to default configuration
* Adapted examples accordingly and updated README and docs
* Changed blizzard setup to use /scratch for working, read account from .acct

expconfig.py

@@ -186,6 +186,15 @@ class ExpConfig(ConfigObj):
                 ))
             )
 
+        def read_value(value):
+            if os.path.exists(value):
+                stream = open(value)
+                result = stream.read().strip()
+                stream.close()
+            else:
+                result = ''
+            return result
+
         def split_date(value):
             '''Re-format datetime string to list for use in namelists'''
             match = re.match(r'^0*(\d+)-0*(\d+)-0*(\d+)'
@@ -235,6 +244,10 @@ class ExpConfig(ConfigObj):
             if match:
                 return split_date(match.group(1))
 
+            match = re.match(r'^read\((.*)\)$', value, re.S)
+            if match:
+                return read_value(match.group(1))
+
             return value
 
         # Interpolate and evaluate keys if they are an expression