[CI] Added running functional tests against live elasticsearch at Travis CI [http://travis-ci.org/#!/karmi/tire]
[CI] Added running functional tests against live elasticsearch at Travis CI [http://travis-ci.org/#!/karmi/tire]

Squashed from the `karmi/tire@travis` branch:

c2d7f0d ‣ Restructuring the Travis configuration
79f454d ‣ Added running integration tests against live elasticsearch on Travis
d1c4374 ‣ Allow build failures on 1.8.7 and REE
b4fa8a0 ‣ Changed, that integration tests are run only on Ruby 1.9, unit tests on all Rubies

brijeshgpt7/retire,doximity/tire,ChapterMedia/tire,Telmate/tire,tklee/tire_shiphawk,rubydubee/retire,HenleyChiu/tire,fairfaxmedia/tire,dbose/retire,elbuo8/retire,mavenlink/retire,alphagov/tire,zaharpecherin/retire,fabn/retire,iamrahulroy/retire,karmi/retire,1776/tire