Support nested previous_attributes; version bump.

Expose 'deleted' on Customer. Version bump.

Unlike other objects, deleted customers can be retrieved. Fixes stripe#6.

add plan update method

Add no-arg Customer.cancelSubscription.

Also expose additional props on Subscriptions. Version Bump.

Add partial refunds; version bump

GAE changes: SDK 1.4.0 support, increase timeout to 55 seconds.

version bump

include VERSION in jar

Add coupons to discount objects

add coupon fields; bump version