Upload base files

[Andi Albrecht]

You can now push base files for a patch set with upload.py to
Rietveld.
To use this feature grab the latest version of upload.py (http://
codereview.appspot.com/static/upload.py) and use the '-l' flag to
upload the files. 'svn cat' is used to fetch the original versions of
the files you've changed and they are pushed to codereview along with
your patch set.

Here's an example:

upload.py -m "Test" -l

If you encounter any problems with this function, please report it
here!

Ondrej, it shouldn't be very tricky to integrate your mercurial patch
into the current version of upload.py. Just drop me a line if you have
any questions regarding the server side stuff.

Andi

[Ondrej Certik]

Thanks Andi for the work you did and also the CSS styling. Yes, now it
should be realy easy. I just go busy with other things lately, but
sooner or later I'll get back to it.

Ondrej