Attempt to fix Travis build (#54)

* Attempt to fix Travis build

Binds Trusty distro version.
Obtains OpenJDK 6 according to Travis rules.

* Upgrade as close as possible

Uses latest Scala in 2.10 and JDK 8.

Author: gemelen

.travis.yml

@@ -1,8 +1,8 @@
 language: scala
 scala:
-   - 2.10.4
+   - 2.10.7
 jdk:
-   - openjdk6
+   - openjdk8
 
 # Fix OpenJDK builds
 # https://github.com/travis-ci/travis-ci/issues/5227