update to version 0.50

Author: dipoo

src/org/arong/egdownloader/version/Version.java

@@ -8,7 +8,7 @@ public final class Version {
 	// 程序名
 	public final static String NAME = "EG下载器";
 	// 程序版本号
-	public final static String VERSION = "0.50 b";
+	public final static String VERSION = "0.50";
 	// 程序作者
 	public final static String AUTHOR = "阿荣";
 	// 程序最后修改时间