Added "Mark entire Volume as Unread" option.
- Revised imageTemp.getPath check logic
  (Added a java.net.URLDecode.decode function to handle special characters on filepaths. I dunno why but big images with special chars don't work on my ICS, sample pics: Hataraku Maou-sama! Vol.01->Novel Illust->2nd pic and Campione! cover pic.)
- View Changelog on Version Click, it opens the file /res/raw/changelog.txt
  (.. and added changelog.txt file on /res/raw/, which needs to be updated each release.)
Merge pull request #99 from yaminorito/master

Mark entire Volume as Unread, revised imageTemp.getPath, and View Changelog
Refactor read raw resources
Update zoom handler for Android 4.4
Update redlink handler for read status
Add filter on Update History