Tungsten Replicator moved to GitHub with Apache license

It had been in the making for long time. Google announced that Google Code would be closing, and since then the Continuent team has been hard at work to handle the transition. You can guess it: this operation would have been quicker if it had been done by a small company like we were one year ago, but being part of a large corporation introduces some constraints that have affected our schedule.

However, our wish has always been, and still is, to keep Tungsten Replicator as an open source product, with full functionalities and with the full benefits that the open source development model offers.

Today, Tungsten Replicator is available on GitHub as vmware/tungsten-replicator, and it is wearing new clothes. It is not GPL anymore. In an effort to facilitate contributions, its license was changed to Apache 2.0.

Feature-wise, there is little difference from the previous release of 4.0. Mainly, we have cleaned up the code and moved out the pieces that no longer fit:

1. Bristlecone was removed from the package. It is used only for testing, and it will be released separately. There is no need to duplicate it into every Tungsten tarball.
2. The cookbook recipes have been retired. These scripts were created when the installer was still in its infancy and we had little documentation. Therefore, it was convenient to have wrappers for the common installation operations. Using the manual, it is pretty easy to install master/slave, fan-in, and multi-master topologies. The biggest reason for removing the cookbook, though, is that it was only useful for MySQL replication. If you need heterogenous deployments, the cookbook was an obstacle, rather than being helpful.
3. Some files were shuffled within the deployment tree. The ./tungsten-replicator/scripts directory was merged with ./tungsten-replicator/bin, the applier templates were moved from samples to a dedicated path, and we also did some other similar cleanup.

Although it has changed location and license, this is not a "release." If you compile the code, it will come up as 4.1, but it is still work in progress. Same as what was happening in the previous repository, we tag the code with the next version, and start working on it until it is deemed ready for release. The latest release for production (4.0.1) is still available from the old directory.

The code is available on GitHub, which makes collaboration much simpler than the previous repository. Take advantage of it: fork it, and help make the best replication tool even better!