Add codereview.settings.

Add codereview.settings.

This is for us to use codereview.appspot.com for code reviews.

Instructions to use codereview.appspot.com:

1. Get depot_tools and add PATH to the directory
http://dev.chromium.org/developers/how-tos/depottools

2. In your local IBus git repository,

% git checkout master
% git checkout -b somefix
make changes
% git cl upload
do code reviews at codereview.appspot.com
once it's done, run "git cl push" if you can commit.
otherwise, ask committers to commit on behalf.

Add target for build debian packages.

BUG=none
TEST=build fine

Review URL: http://codereview.appspot.com/2229048