Merge pull request #184 from elandau/master

Update to rxjava 1.0.0.-rc7
[Gradle Release Plugin] - pre tag commit:  '2.0-RC11'.
[Gradle Release Plugin] - new version commit:  '2.0-RC12-SNAPSHOT'.
Allow ribbon to be compiled with java8.

Disables doclint for the javadoc task, and uses findbugs 3.0.0 unless
compiling with java6.
Update gradle.properties
[Gradle Release Plugin] - pre tag commit:  '2.0-RC11'.
Update gradle.properties
[Gradle Release Plugin] - new version commit:  '2.0-RC13'.
[Gradle Release Plugin] - new version commit:  '2.0-RC14'.
Merge pull request #185 from dmuino/java8

Allow ribbon to be compiled with java8.