Add pear modules, mail and net_smtp via composer (#93)

Add pear modules, mail and net_smtp via composer, remove php 5.6 build due to phpunit 6

lib/composer/vendor/dflydev/dot-access-data/.travis.yml

@@ -0,0 +1,13 @@
+language: php
+
+php:
+  - 5.3
+  - 5.4
+  - 5.5
+  - 5.6
+
+before_script:
+  - wget -nc http://getcomposer.org/composer.phar
+  - php composer.phar install --dev
+
+script: phpunit --coverage-text