* uploadSplash.cs:
* UploadLanding.cs:
* Upload_FTP.cs:
* Upload_Local.cs:
* UploadLanding.cs: Upload system modification

* ShottyGtk.sln: new dependencies

* Class1.cs: Moved out thread init into Gtk.Window class

* Methods.cs: Moved around screenshot methods

* ShottyGtk.csproj: New dependency.

* Workplace.cs:
* mainWindow.cs:
* settingsMenu.cs: UI changes for GTK3