Method chaining in Timeline.

src/Timeline.h

@@ -62,8 +62,8 @@ Example usage:
 MyApplication::MyApplication(const Parameters& parameters): Platform::Application(parameters) {
     // Initialization ...
 
-    timeline.setMinimalFrameTime(1/120.0f); // 120 FPS at max
-    timeline.start();
+    timeline.setMinimalFrameTime(1/120.0f)  // 120 FPS at max
+        ->start();
 }
 
 void MyApplication::drawEvent() {
@@ -93,12 +93,14 @@ class MAGNUM_EXPORT Timeline {
 
         /**
          * @brief Set minimal frame time
+         * @return Pointer to self (for method chaining)
          *
          * Default value is 0.
          * @see nextFrame()
          */
-        inline void setMinimalFrameTime(Float seconds) {
+        inline Timeline* setMinimalFrameTime(Float seconds) {
             _minimalFrameTime = seconds;
+            return this;
         }
 
         /**