[sr-dev] master feature freeze

Please don't commit any new features to master, only bug fixes and documentation updates (they should go to sr_3.0, but for a short time until everybody gets used to the new branch we will use both of them). If you want to commit new features, please use another branch name, either something under tmp/ or under <your_username>/ and we will merge it into master once the freeze is over. This freeze should last only a short time (maybe 1 week, we'll see how things are going). Andrei