Added bug fixes and some enhancements

Fixed bug when creating the file that holds the path list
Added access to the folder '\MyDocuments\PictureViewer'
Added logic to create file that holds path information in the
'\MyDocuments\PictureViewer' folder by default
Added logic to create the file that holds path information by using a
path in the app.config file
Added single EXE file for installation.   It will install at
\%ProgramFiles%\SavageCreations\PictureViewer