1) fixes a bug with the LibraryGridViewController which was resulting in thumbnails being updated properly; code refactoring so as to make sure that "LibraryGridItemView" objects used the new "ICloudUIImageView" class as its UIImageView
1) removes keyForLastLoadedBoardIndex from the saving to NSUserDefaults
1) fixes a bug where the new "Content" folder was not being properly created on fresh installations of the app which opted for iCloud Storage
1) fixes a bug where the "DrawThicknessViewController" was not properly displaying the line thickness visualization on the apps first install and launch
1) code formatting changes
1) fixes a bug where the app was erroneously reporting a failed to be loaded drawingLayerFile
1) code formatting changes