* src/dense/ftdense.c: Add dense_render_line2 function, that takes
a PreLine as argument.
FT_Outline_Decompose call in dense_render_glyph replaced by a loop
that renders PreLines
* src/dense/ftdenserend.c: Add support for shifting PreLines as
per target bitmap
Breakdown of what the files will contain
* src/dense/ftdenserend.c, src/dense/ftdenserend.h: The 'dense' renderer.
* src/dense/ftdense.c, src/dense/ftdense.h: The rasterizer for the
'dense' renderer.
* src/dense/ftdenseerrs.h: Common error defines.
* src/dense/dense.c: For building a single object of the entire module.