TASK: Update Travis CS setup

This updates the used Elasticsearch from 1.7.0 to 1.7.5 and adds PHP 7.0

Author: kdambekalns

.travis.yml

@@ -1,13 +1,14 @@
 language: php
 matrix:
   include:
+    - php: 7.0
     - php: 5.6
     - php: 5.5
 sudo: false
 before_install:
   - cd ..
-  - wget --no-check-certificate https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.7.0.zip && unzip elasticsearch-1.7.0.zip
-  - mv elasticsearch-1.7.0 elasticsearch
+  - wget --no-check-certificate https://download.elastic.co/elasticsearch/elasticsearch/elasticsearch-1.7.5.zip && unzip elasticsearch-1.7.5.zip
+  - mv elasticsearch-1.7.5 elasticsearch
   - cd elasticsearch
   - bin/elasticsearch -d
   - cd ..