added a 'namespace' of HTMLViewer to PixelsPerInch, PointsPerInch, and PointsPerPixel because these consts are turned into #define's in the C++ .hpp files, which makes it impossible to use PixelsPerInch anywhere else in any of the components in the project
Merge pull request #74 from nachbar/NamespacePixelsPerInch

added a 'namespace' of HTMLViewer to PixelsPerInch, PointsPerInch, and P...