Netflix/astyanax — pull request #436 by yyc1217 (2013-11-30 11:53:38+00:00)
Title: Custom type of Set and Map serialization

For custom type of Set and Map serialization.
Set:
------------

@Column
@Serializer(FooSerializer.class)
private Set fooSet;

`SetColumnMapper` gets FooSerializer from **@Serializer**.
If there is no explicit **@Serializer**, then it will inferred from `Foo`, which is the first generic type.
Map:
------------
@Column
@Serializer(FooSerializer.class)
private Map fooMap;

`MapColumnMapper` gets FooSerializer from @Serializer only for **value** part, not for key.
If there is no explicit @Serializer, then it will inferred from 'Foo', which is the second generic type. It's not support custom type key for now.