Added menu button to open  library's root directory
About windows not gets the app version from the assemblyinfo file
Moved Busy bar functions to separate file
Snycing library now shows determinate progress in the busy bar while new books are being added
Added description filed to book edit
Book can now have multiple categories attached to it
Categories attached to a book display as tag-stamps (in the book edit), removable by a click
Categories associated with book are now saved in separate sql table
Categories specified in epub files, are now assigned to books automatically
Filter updated to filter data directly in the SQL query, instead of pulling the entire list and then filtering it
Book files can now be added into the library by dragging them on the main window with a mouse
Changed book grid look.
Categories added automatically from a book file, are now marked with a different style in the book editing window.