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/phpdocumentor/reflection-common/.travis.yml

@@ -0,0 +1,35 @@
+language: php
+php:
+  - 5.5
+  - 5.6
+  - 7.0
+  - 7.1
+  - hhvm
+  - nightly
+
+matrix:
+  allow_failures:
+    - php:
+      - hhvm
+      - nightly
+
+cache:
+  directories:
+    - $HOME/.composer/cache
+
+script:
+  - vendor/bin/phpunit --coverage-clover=coverage.clover -v
+  - composer update --no-interaction --prefer-source
+  - vendor/bin/phpunit -v
+
+before_script:
+ - composer install --no-interaction
+
+after_script:
+  - if [ $TRAVIS_PHP_VERSION = '5.6' ]; then wget https://scrutinizer-ci.com/ocular.phar; php ocular.phar code-coverage:upload --format=php-clover coverage.clover; fi
+
+notifications:
+  irc: "irc.freenode.org#phpdocumentor"
+  email:
+    - me@mikevanriel.com
+    - ashnazg@php.net