Readd Travis support and update documentation

.travis.yml

@@ -0,0 +1,20 @@
+language: php
+
+php:
+  - '7.0.17'
+  - '7.0'
+  - '7.1.2'
+  - nightly
+
+before_script:
+# In case of timeouts and build failures you may want to prepend 'travis_retry' to the following commands:
+  - curl -s http://getcomposer.org/installer | php
+  - php composer.phar install -n
+
+# Explicitly use the phpunit from composer, not any system-wide found
+script: 
+  - vendor/bin/phpunit tests 
+# newer versions of phpunit allow this configuration: -c phpunit.xml --coverage-clover=coverage.xml tests
+
+after_success:
+  - php vendor/bin/codacycoverage clover 

README.md

@@ -108,13 +108,17 @@ Add codacycoverage to your `.travis.yml`:
 ```yml
 # .travis.yml
 language: php
+
+# Do not forget to provide your CODACY_PROJECT_TOKEN as described in https://docs.travis-ci.com/user/environment-variables/#Defining-Variables-in-Repository-Settings
+
 php:
   - 5.3
   - 5.4
   - 5.5
   - 5.6
   - hhvm
 
+# In case of timeouts and build failures you may want to prepend 'travis_retry' to the following commands:
 before_script:
   - curl -s http://getcomposer.org/installer | php
   - php composer.phar install -n