Merge pull request #113 from naimdjon/master

#110: jcenter is not supported in gradle < 1.7
chore(gradle): update gradle to 2.0 and fix gradle missing wrapper.
chore(gradle): publish artifacts to remote maven repositories.
Merge pull request #117 from hastebrot/master

chore(gradle)
chore(travis): add `.travis.yml`.
Merge pull request #118 from hastebrot/master

chore(travis): add `.travis.yml`.
chore(travis): Try to use xvfb (X Virtual Framebuffer).
Merge pull request #119 from hastebrot/master

chore(travis): Try to use xvfb (X Virtual Framebuffer).
chore(gradle): Add project.jfxrtLocation to test.classpath.
fix(NodeFinderImplTest): Ignore all feature tests if not using Java 1.8.
Merge pull request #120 from hastebrot/master

chore(gradle): Add project.jfxrtLocation to test.classpath.