Started adding some high-level SimpleEntityManager unit tests and a simple base class for doing so with Mockito.
Add support for the "insertable" and "updatable" attributes in the @Column and @JoinColumn annotations. This allows you to chose whether you want these fields sent to the Salesforce server for persist or merge. Also added default settings for these attributes for the standard fields.
Add a test for recursive type reference to make sure we don't recurse forever.
Add a test for @Transient.
Delete unneeded file.