Setup travis CI and phpunit bootstrap file.

.travis.yml

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+language: php
+
+php:
+  - '5.6'
+  - '7.0'
+  - hhvm
+  - nightly
+
+before_script:
+  - composer self-update
+  - composer install
+
+script: vendor/bin/phpunit

phpunit.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<phpunit bootstrap="tests/bootstrap.php"
+         colors="true"
+         convertErrorsToExceptions="true"
+         convertNoticesToExceptions="true"
+         convertWarningsToExceptions="true"
+         verbose="true">
+    <testsuites>
+        <testsuite name="Themosis test suite">
+            <directory suffix="Test.php">./tests</directory>
+        </testsuite>
+    </testsuites>
+</phpunit>

tests/bootstrap.php

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+<?php
+
+/**
+ * Composer autoload
+ */
+require __DIR__.'/../vendor/autoload.php';