Merged pdcurses into master

* apps/graphics/pdcurs34: Initial steps to support less than 8-pixel fonts on less than 8-bit display

* pdcscrn.c edited online with Bitbucket

* apps/graphics/pdcurs34: Calculation of font buffer stride must depend on the configured BPP.

* apps/pdcurs34:  Rearrange some things so that there is slightly less conditional compilation.

* apps/pdcurs34:  Fix a misnamed label; add first cut at function to copy a font into the font buffer; Make better use of macros to reduce code complexity.

* apps/graphics/pdcurses:  Fix a few compile issues with last commit.