Fixed a couple of typos left from renaming.
Fixed compilation paths for Raft.
Fixed build errors from GCC 4.6.

GCC 4.6 doesn't have std::map<K, V>::emplace() function. Wow.
Bumped up the required Boost version.
Taking const reference of temporary object doesn't look good.

Otherwise it results in memory corruption when some of config categories doesn't exist.
Merge pull request #123 from 3Hren/master

Taking const reference of temporary object doesn't look good.
Boost ASIO.
[ASIO] Asynchronous actions unification.
[Locator] Cluster topology reports.
[Node] Simplified Node service API.

Removed bulk operations to simplify error reporting. These are not performance-critical
operations, so one-after-one approach seems better here.
[API] A new shiny client.
[Locator] Asynchronous locator remote linking.
[General] Support for cocaine::result_of<Lambda>.
[RPC] Dispatch discarsion.
[ASIO] Dynamic load balancing for I/O pool.
[RPC] Fixed dispatch to actually be thread-safe.
[Context] Exposed the Port Mapping API.
[Logging] Emit message is a terminal message now.
[RPC] Separate graphs for dispatch & upstream.
[Locator] Allow updating multiple groups at once.