Configurable name conversions - XML, SQL and Java

[GoogleCodeExporter]

Currently the default conversion is:

  XML: my_table_or_column_name

  Java: MyTableOrColumnName
  SQL (MySQL or Oracle database): my_table_or_column_name
  GQL (GAE datastore): MyTableOrColumnName

The Java name can be explicitly set now, but nobody can set the GAE datastore's 
name. The problem is with special names like "_ah_session"

Original issue reported on code.google.com by vbarta...@gmail.com on 11 Jun 2010 at 7:46