editor and game improvements

- (editor) entities can be rotated
- (editor) asteroids get a random angular velocity
- (editor) level title and author can be specified
- (editor) editor can only be quit when clicking the 'X' button
- (game) smaller asteroids have similar velocities as the previous bigger ones

asteroids/Model.h

@@ -41,6 +41,18 @@ class Model : public Engine::ModelBase {
 			mLevelName = name;
 		}
 
+		std::string GetLevelAuthor() { return mLevelAuthor; };
+		void SetLevelAuthor(const std::string &author) {
+			Engine::LogMessage("new level author: %s", author.c_str());
+			mLevelAuthor = author;
+		}
+
+		std::string GetLevelTitle() { return mLevelTitle; };
+		void SetLevelTitle(const std::string &title) {
+			Engine::LogMessage("new level title: %s", title.c_str());
+			mLevelTitle = title;
+		}
+
 		/* Highscore */
 		struct HighscoreEntry {
 			HighscoreEntry(): name ("unknown"), points (0) {	};
@@ -85,6 +97,8 @@ class Model : public Engine::ModelBase {
 		std::string mPlayerName;
 		std::vector<std::string> mLevelList;
 		std::string mLevelName;
+		std::string mLevelAuthor;
+		std::string mLevelTitle;
 
 		virtual bool OnReceiveEvent (const Engine::EventBasePtr &event);