ga4gh/schemas — pull request #195 by jeromekelleher (2014-11-27 16:38:29+00:00)
Title: Fixed schemas for non-null default values.

The default value for unions in Avro must be instances of the first schema. Therefore, we need to change things like

`union { null, long } start = 0;`

to

`union { long, null } start = 0;`