ignore null values when unnmarshalling, #28
write a test to unmarshal without id, #29

so this could not have been the cause of the problem described in the
bug
Fix wrong description texts in the unmarshal test.
Add test for int64 id fields.

Expects one failure.
unmarshalling of int64 IDs, #29
Next fail for ints...
Add all missing int* uint* types to unmarshal
Cleaner code for reflection int magic
Add overflow checks in int conversion
Update int tests to be one context only