0.7.0-SNAPSHOT

Bumping to 0.7.0 because Schedulers is a big feature addition.
Gradle Release Plugin - pre tag commit:  'rxjava-0.7.0'.
Gradle Release Plugin - new version commit:  'rxjava-0.7.1-SNAPSHOT'.
Version 0.7.0
An unsubscribed AtomicObservableSubscription.wrap() unsubscribes its argument.
Corrected naming Operator -> Operation
Merge pull request #232 from mairbek/naming

Corrected naming
Merge pull request #230 from johngmyers/wrap-unsubscribed

An unsubscribed AtomicObservableSubscription.wrap() unsubscribes its argument