Update dependencies
Update dependencies

Ran `composer update` and got these changes:

+---------------------------------------------------+
| Production Changes            | From    | To      |
+---------------------------------------------------+
| doctrine/annotations          | v1.3.1  | v1.4.0  |
| ezyang/htmlpurifier           | v4.8.0  | v4.9.2  |
| guzzlehttp/guzzle             | 6.2.2   | 6.2.3   |
| guzzlehttp/psr7               | 1.3.1   | 1.4.1   |
| monolog/monolog               | 1.22.0  | 1.22.1  |
| paragonie/random_compat       | v2.0.4  | v2.0.10 |
| php-http/client-common        | v1.4.0  | v1.4.1  |
| php-http/discovery            | 1.2.0   | 1.2.1   |
| php-http/httplug-bundle       | v1.3.0  | v1.4.1  |
| php-http/message              | v1.4.1  | 1.5.0   |
| sensio/framework-extra-bundle | v3.0.21 | v3.0.23 |
| sensiolabs/security-checker   | v4.0.0  | v4.0.2  |
| symfony/swiftmailer-bundle    | v2.4.2  | v2.5.3  |
| twig/twig                     | v1.31.0 | v1.32.0 |
+---------------------------------------------------+
+------------------------------------------------------+
| Dev Changes                        | From   | To     |
+------------------------------------------------------+
| mockery/mockery                    | 0.9.8  | 0.9.9  |
| phpspec/prophecy                   | v1.6.2 | v1.7.0 |
| phpunit/php-code-coverage          | 4.0.5  | 4.0.7  |
| phpunit/php-timer                  | 1.0.8  | 1.0.9  |
| phpunit/php-token-stream           | 1.4.9  | 1.4.11 |
| sebastian/code-unit-reverse-lookup | 1.0.0  | 1.0.1  |
| sebastian/object-enumerator        | 2.0.0  | 2.0.1  |
| sensio/generator-bundle            | v3.1.2 | v3.1.3 |
| squizlabs/php_codesniffer          | 2.8.0  | 2.8.1  |
| symfony/phpunit-bridge             | v3.2.3 | v3.2.6 |
+------------------------------------------------------+

stopfstedt/ilios,Trott/ilios,ilios/ilios,dartajax/ilios,thecoolestguy/ilios,stopfstedt/ilios,thecoolestguy/ilios,dartajax/ilios,ilios/ilios,Trott/ilios