Updated versions

Four package updated:

  • FBReader to 2.2.4
  • Bookshelf to 1.0.2
  • PDF & DjVu plugins to 1.0.4

Changes:

  • Better communication between the main program and the plugins
  • Stability issues in PDF and DjVu plugins
  • Cover issues in Bookshelf plugin
  • Search for patterns containing spaces in Bookshelf plugin