Merge Commit 921c703e7181fcecae6f07d5d46b7249c3fdcbc5 from dirong

Add method in Table annotation for set column Id name.
This fixes Issue #83

example:
@Table(name = "Items", id = BaseColumns._ID)
public class Item extends Model {...}

https://github.com/dirong/ActiveAndroid/commit/921c703e7181fcecae6f07d5d46b7249c3fdcbc5
Updated Gradle Version

Use Gradle 1.9