Prefix is now, in fact, a prefix

Merge pull request #6 from henryolik/dev

Rename types with identical name so they all generate properly

Merge pull request #5 from henryolik/dev

Fixed unmarshalling date with a timezone defined

base64 & Hex values are now treated as any other values

Merge pull request #3 from henryolik/dev

Make only optional complex types pointers

Merge pull request #2 from henryolik/dev

Fix zero datetime values in resulting XML

Merge pull request #1 from droyo/omitempty-structs

Omitempty structs

Fix xsdgen/example_test