Travis cleanup

Add PHP 7, simpler tool installs, remove junk.

.travis.yml

 sudo: false
+
 language: php
+
 php:
-  - 5.3
-  - 5.4
-  - 5.5
+  - '5.3'
+  - '5.4'
+  - '5.5'
+  - '5.6'
+  - '7.0'
 
 notifications:
   email:
@@ -12,32 +16,16 @@ notifications:
 
 before_script:
   # PHP_CodeSniffer
-  - pear install pear/PHP_CodeSniffer
-  - phpenv rehash
+  - curl -o phpcs.phar https://squizlabs.github.io/PHP_CodeSniffer/phpcs.phar
   # PHP Copy/Paste Detector
   - curl -o phpcpd.phar https://phar.phpunit.de/phpcpd.phar
-  # PHP Mess Detector
-  - pear config-set preferred_state beta
-  - printf "\n\n" | pecl install imagick
-  - pear channel-discover pear.phpmd.org
-  - pear channel-discover pear.pdepend.org
-  - pear install --alldeps phpmd/PHP_PMD
-  - phpenv rehash
-  # PHPLOC
-  - curl -o phploc.phar https://phar.phpunit.de/phploc-2.0.6.phar
   # Basic config required for PHPUnit
   - cp qa-tests/phpunit-qa-config.php qa-config.php
 
 script:
-  # Most of this has been turned off until the code is actually close to passing
-  # PHP_CodeSniffer
-  #- phpcs --report=emacs --extensions=php --standard=qa-tests/phpcs/ruleset.xml .
-  # PHP Mess Detector
-  #- phpmd --exclude qa-include/vendor/ . text codesize
-  #- phpmd --exclude qa-include/vendor/ . text unusedcode
+  # PHP_CodeSniffer (turned off for now)
+  #- php phpcs.phar --report=emacs --extensions=php --standard=qa-tests/phpcs/ruleset.xml .
   # PHP Copy/Paste Detector
   - php phpcpd.phar --exclude vendor .
-  # PHPLOC
-  - php phploc.phar .
   # PHPUnit
   - phpunit --bootstrap qa-tests/autoload.php qa-tests