added pypyodbc

VERSION

@@ -1 +1 @@
-Version 2.4.1-alpha.2+timestamp.2013.02.10.23.21.45
+Version 2.4.1-alpha.2+timestamp.2013.02.10.23.27.47

gluon/dal.py

@@ -339,10 +339,13 @@ if not 'google' in DRIVERS:
         LOGGER.debug('no Oracle driver cx_Oracle')
 
     try:
-        #try:
+        try:
-        import pyodbc
+            import pyodbc
-        #except ImportError:
+        except ImportError:
-        #    from contrib.pypyodbc import pypyodbc as pyodbc
+            try:
+                import contrib.pypyodbc as pyodbc
+            except Exception, e:
+                raise ImportError(str(e))
         DRIVERS.append('MSSQL(pyodbc)')
         DRIVERS.append('DB2(pyodbc)')
         DRIVERS.append('Teradata(pyodbc)')