Fixes and updates

A big thank you to all who sent in their feedback on issues they encountered, ideas and suggestions.

Fixes:
* The Legend of the Condor Heroes《射鵰英雄傳》 Chapter 18 was a repeat of Chapter 17. The error has been resolved.
* Some people had problems with the last two pages of The Legend of the Condor Heroes《射鵰英雄傳》 Chapter 5. The issue should no longer occur. Do let me know if you encounter the same problem elsewhere.
* The Heaven Sword and the Dragon Sabre《倚天屠龍記》 Chapter 1 was missing. The system automatically redirected readers to Chapter 10 instead. Chapter 1 has been added, thus eliminating the redirect.
* There were a few reports of wrong file names or incomplete ebooks. The download links have since been updated.