first attempt at unscaled glyph dimensions
set glyph advance to floor for mapnik 2.x parity
line_height, ymin, ymax and advance all look right now
fix char_height zero
fix line height
remove unecessary x_scale/y_scale multiplication
Merge branch 'master' into unscaled-glyphs
moving instead of copying mapnik::glyph_info
Merge branch 'master' into unscaled-glyphs

Conflicts:
	include/mapnik/text/dummy_shaper.hpp
	include/mapnik/text/harfbuzz_shaper.hpp
	include/mapnik/text/icu_shaper.hpp
Merge pull request #2272 from mapnik/unscaled-glyphs

Unscaled glyphs