Add Java 8 to Travis CI build matrix
Upgrade to Gradle 1.9
Upgrade to JUnit 4.11 and Mockito 1.9.5
Upgrade to Findbugs/JSR 305 2.0.2
Expand version range to include Guava 15.0
Merge pull request #6 from joschi/java8-travis

Add Java 8 to Travis CI build matrix
Merge pull request #7 from joschi/dependency-updates

Dependency updates
Merge pull request #8 from joschi/master

Fix JUnit imports in AttemptTimeLimiterTest