Translation Updates:

* Remove `bp-languages` directory and `buddypress.pot` from `src` directory.
* Move `buddypress.pot` into root of `build` directory.
* Update `Gruntfile.js` to only run `makepot` task when building a new release.
* We'll need to update GlotPress to point to the `plugins.svn.wordpress.org` repository later.

Props netweb. See #5621.



git-svn-id: https://buddypress.svn.wordpress.org/trunk@8468 cdf35c40-ae34-48e0-9cc9-0c9da1808c22