[Elasticsearch] Return if some error occurred while adding node endpoint.
[Elasticsearch] Added cluster nodes info request builder.
[Elasticsearch] Nodes pool is now thread-safe.
[Elasticsearch] Added maybe-idiom for response processing.
[Elasticsearch] Balancer has been integrated.
[Elasticsearch] Bulk write request holder added.
[Elasticsearch] Cluster info request holder has now proper result type.
[Project] Elasticsearch files reorganization.
[Elasticsearch] Connection class moved into separate file.
[License] No, it wasn't GPL.
[Elasticsearch] Requests now should have static method (GET, POST etc) variable.
[Elasticsearch] Extending bulk write request info.

All requests now have its methods defined.
[Elasticsearch] Fix delegating initialization.
[Elasticsearch] Using libswarm to implement http connection class.
[Elasticsearch] Fixed wrong boost::get usage.
[Elasticsearch] Proper error handling.
[Elasticsearch] Defining response types for actions.
[GCC 4.4] Arrrgh.
[Elasticsearch] Defined own result type for bulk write request.
[Elasticsearch] Code style.
[Elasticsearch] Fix.
[Elasticsearch] Added skeleton for json extracting.
[Elasticsearch] Settings is also needed for transport.
[Elasticsearch] Added intermediate request watcher.