too much changes to go into master

pyfpdb/Exceptions.py

@@ -1,4 +1,23 @@
-class FpdbParseError(Exception): 
-    def __init__(self,hid=None):
-        self.hid = hid
+class DuplicateError(Exception):
+    def __init__(self, value):
+        self.value = value
+    def __str__(self):
+        return repr(self.value)
+
+class FpdbError(Exception):
+    def __init__(self, value):
+        self.value = value
+    def __str__(self):
+        return repr(self.value)
+
+class FpdbParseError(Exception): 
+    def __init__(self,value='',hid=''):
+        self.value = value
+        self.hid = hid
+    def __str__(self):
+        if hid:
+            return repr("HID:"+hid+", "+self.value)
+        else:
+            return repr(self.value)
+