Merge pull request #117 from hastebrot/master

chore(gradle)
Merge pull request #118 from hastebrot/master

chore(travis): add `.travis.yml`.
Merge pull request #119 from hastebrot/master

chore(travis): Try to use xvfb (X Virtual Framebuffer).
Merge pull request #120 from hastebrot/master

chore(gradle): Add project.jfxrtLocation to test.classpath.
Update build files
 - Update build to Gradle 2.0 (be mindful of += with collections)
 - Apply bintray and coveralls plugins
 - Setup aggregate cobertura reports
 - Switch back to jcenter() in repositories as build is now Gradle 2.0 compatible
 - Update cobertura classpath with jfxrt jar
Apply source/target compatibility to all subprojects; Shutdown pedantic doclint in JDK8+
fix(ToolkitAppLauncher): AppLauncher could not retrieve primary Stage on OSX.
Merge pull request #126 from hastebrot/fix-app-launcher-osx

fix(ToolkitAppLauncher): AppLauncher could not retrieve primary Stage on OSX.
Merge pull request #122 from aalmiray/update_gradle_build

Update build files