Better header

[GoogleCodeExporter]

1. The header should contain some useful information and statistics:
- number of objects
- number of classes
- date and time of serialization
- author
- image data (platform, version, image file name)
- (class names)
- (number of objects of each class)
- (amount of time it took to serialize)
- (purpose, e.g. serialized debugger)

2. To achieve the above the header needs to be serialized after analysis, i.e. 
in the materialization object, not the materializer as is currently the case

Original issue reported on code.google.com by maxle...@gmail.com on 4 Mar 2014 at 1:15

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will remain open but will probably not come into focus. If you still think this should receive some attention, leave a comment. Thank you for your contributions.