Added load/dump methods which work similarly to those found in

simplejson. Tests seem to work so far. Still need to figure out
how to get data into the records in some easy way.

model.py

@@ -1,6 +1,8 @@
-from fields import Field, TextField, MoneyField, StateField
+from fields import Field
+
+class Model(object):    
+    record_identifier = '  '
 
-class Model(object):
     def __init__(self):
         for (key, value) in self.__class__.__dict__.items():
             if isinstance(value, Field):
@@ -32,12 +34,10 @@ class Model(object):
             f.validate()
 
     def output(self):
-        return ''.join([field.get_data() for field in self.get_sorted_fields()])
+        return ''.join([self.record_identifier] + [field.get_data() for field in self.get_sorted_fields()])
     
+    def read(self, fp):
+        for field in self.get_sorted_fields():
+            field.read(fp)
 
-        
-class TestModel(Model):
-    field_a = TextField(max_length=20)
-    field_b = MoneyField(max_length=10)
-    state = StateField()