Add missing `forum.js`. Props SGr33n. Fixes #2568.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5324 9866e705-20ec-0310-96e7-cbb4277adcfb
Use `basename` instead of `file` in plugin action links. Props DJPaul. Fixes #2567.

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5325 9866e705-20ec-0310-96e7-cbb4277adcfb
More grunt updates:
* Add `grunt-patch-wordpress` to `package.json`
* Adds grunt task `grunt patch` to `grunt build` and `grunt build-release`
* Requires fresh `npm install` to update dependencies 
* Full instructions https://github.com/aaronjorbin/grunt-patch-wordpress#patching-from-the-command-line
* Props jorbin. See #2542



git-svn-id: https://bbpress.svn.wordpress.org/trunk@5326 9866e705-20ec-0310-96e7-cbb4277adcfb
Bump NPM package versions in `package.json`
* `grunt-wp-i18n` to v0.4.3 https://www.npmjs.org/package/grunt-wp-i18n
* Fixes numerous PHP error notices
* Add's support for custom headers in bbpress.pot
 * ['report-msgid-bugs-to'] = 'https://bbpress.trac.wordpress.org';;
 * ['last-translator'] = 'JOHN JAMES JACOBY <jjj@bbpress.org>';
 * ['language-team'] = 'ENGLISH <jjj@bbpress.org>';
* Requires `npm install` to update packages and dependencies
* Props netweb. See #2542

git-svn-id: https://bbpress.svn.wordpress.org/trunk@5327 9866e705-20ec-0310-96e7-cbb4277adcfb