Fix for non-ascii characters in MangaReader chapter names

I discovered that chapter 139 of Claymore
(http://www.mangareader.net/claymore) on MangaReader had a non-ascii
character in it. This change seems to handle unicode well enough to
download without errors.
Merge pull request #32 from wyldphyre/1407aac5cb5796f59c67fe51ef37b55a50b39fe2

Fix for unicode characters in MangaReader chapter names