godeps now includes all architectures and OS's

[roger peppe]

I just landed a change to godeps that makes it include
dependencies for all known architectures and operating systems.

It also now includes testing dependencies by default (no need
for -t flag - use -T if you need the old default behaviour).

This means that to calculate dependencies for juju
(or any project that uses godeps) there's no need
to set GOOS=windows to get windows-specific dependencies too.

Update with:

   go get -u github.com/rogpeppe/godeps

While I'm here, I'd like to say, please try to avoid
editing the dependencies.tsv file by hand - using the
godeps tool to do it is less error prone and means
we won't see spurious date changes when the commit
has been changed but the date has not.

  cheers,
    rog.