Add docker.inspect() api

src/docker.js

@@ -14,6 +14,7 @@ exports = module.exports = {
     deleteContainers: deleteContainers,
     createSubcontainer: createSubcontainer,
     getContainerIdByIp: getContainerIdByIp,
+    inspect: inspect,
     execContainer: execContainer
 };
 
@@ -387,6 +388,18 @@ function getContainerIdByIp(ip, callback) {
     });
 }
 
+function inspect(containerId, callback) {
+    assert.strictEqual(typeof containerId, 'string');
+    assert.strictEqual(typeof callback, 'function');
+
+    var container = exports.connection.getContainer(containerId);
+
+    container.inspect(function (error, result) {
+        if (error) return callback(error);
+        callback(null, result);
+    });
+}
+
 function execContainer(containerId, cmd, options, callback) {
     assert.strictEqual(typeof containerId, 'string');
     assert(util.isArray(cmd));