pdf no font embed and patterns corrections

Add an option for the PDFCreationSettings provided on StartPDF* to
PDFWriter to determine if fonts are to be embedded or not. This should
allow people to create non-embedded versions of PDFs if they want to.

Also, found compilation issues with the Patterns implementation, so got
them corrected.
load glyphs is always done with no hinting

for performance expected improvement i force loading glyphs from
freetype with no hinting or auto hinting, as i normally require the
loading just to get the direct font information (width, glyph box), with
no extras
also for load_char
contributions from SoftHorizons John Desrosiers

Performance improvements around FreeType usage, caching queries for
glyph widths and much improving their speed.
Merge branch 'master' of https://github.com/StefanWoe/PDF-Writer into StefanWoe-master

Conflicts:
	PDFWriter/ITiledPatternEndWritingTask.h
	PDFWriter/PDFWriter.vcxproj.filters
os2 tables were not embedded

This causes the windows version of acrobat to complain that the embedded
true type is invalid when running PDF-2x/PDF-4x validation
_ITERATOR_DEBUG_LEVEL=0
Merge remote-tracking branch 'origin/master'

Conflicts:
	PDFWriter/DocumentContext.h
	PDFWriter/ITiledPatternEndWritingTask.h
	PDFWriter/PDFWriter.vcxproj.filters
	PDFWriter/TIFFImageHandler.h