The filename found in the URL will be used for old plugins missing a
base entry in their plugin.info.txt and lacking a subdirectory inside
the archive as well. This patch makes sure possible query strings aren't
included in the filename.

Note: io_download() will also try to get a filename from any
content-disposition header.

If no filename can be found we simply use an md5 sum of the URL and hope
the plugin will contain it's own hint for naming.

PHP_EOL is platform dependent, so you get in trouble while migrating
between platforms.

they were just catching and rethrowing

this is not a extension specific cache but a global one. no need to
purge for each installed extension

* recursivedelete:
  added tests for io_rmdir
  added recursive delete function to io.php

* master:
  fixed error in .travis.yml

Translation update (ar)

Minified jQuery contains a source mapping hint that will result in a 404
in Chrome. I removed the hint for now. A better solution (eg. fixing the
mapping URL) should be found.

Fixed typo

Translation update (bg)

Translation update (ar)

Translation update (he)