Create Vidalia Obfsproxy Bridge Bundle containing Tor 0.2.4.2-alpha

Tor 0.2.4.2-alpha will contain #3589 (moved) which makes bridges advertise their pluggable transports in extra-info descriptors and #4567 (moved) which extends Tor's UPnP support to open pluggable transport ports, too.

We promised to the sponsor to deliver a "released version of Tor with the sum of the work performed on pluggable transports year to date" which includes a "testing package" as measurable output.

We should create a Vidalia Obfsproxy Bridge Bundle containing 0.2.4.2-alpha. A Windows version should be sufficient for this package, and we don't have to add this bundle to the long list of bundles we will support in the future.

If possible, we should have this package available by our internal deadline on September 15. If this isn't possible, e.g., because there is no Tor 0.2.4.2-alpha until then, a later date until September 30 is fine, too.

Assigning to erinn after discussing this task in private mail. Thanks!