Remove @ToDo 'Implement Feeds' PHPDoc reference in `bbp_register_view()`, feeds were added for views in r3171 and r3172. Fixes #2631

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5481 9866e705-20ec-0310-96e7-cbb4277adcfb
Improved topic merge verbiage in form-topic-merge.php template.
Props johnjamesjacoby. Fixes #2539

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5482 9866e705-20ec-0310-96e7-cbb4277adcfb
Improved inline docs readability for Grunt task `jshint`.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5483 9866e705-20ec-0310-96e7-cbb4277adcfb
Update Travis CI `.travis.yml`:
* Include WordPress .4.0 in test matrix
* Now that PHP 5.6 has been released move tests from "allowed to fail" to required
* Exclude PHP 5.6 and WordPress 3.7 from tests (Ignore the deprecated mysql_connect() warnings

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5484 9866e705-20ec-0310-96e7-cbb4277adcfb