Package PDFmorph tutorial files

Make HTML and PDF manual modeled after [PDFgui HTML manual](https://www.diffpy.org/doc/pdfgui/index.html) and [PDFgui PDF manual](https://www.diffpy.org/doc/pdfgui/pdfgui.pdf) with sources [here](https://github.com/diffpy/diffpy.pdfgui/tree/master/doc/manual)