Release dvisvgm 3.4 · mgieseki/dvisvgm

Option --embed-bitmaps is now also applied to images included with special dvisvgm:img (#229).
Added macro {?cmyk(c,m,y,k)} to allow for directly specifying CMYK colors in literal SVG fragments.
Extended the dvips color specials to distinguish between fill and stroke colors. For further information see
the manual page.
Added color special color set to replace the current color without pushing a new value onto the color stack.
See the manual page for more details.
Added macros {?fillcolor} and {?strokecolor} to retrieve the current fill and stroke color, respectively.
The former macro {?color} equals {?fillcolor} and is still available too.
Replaced millimeter units with big point (bp) units in the message showing the extent of the generated SVG file.
TeX's big points equal SVG, PostScript, and PDF points (1in = 72bp), while TeX points are slightly smaller (1in = 72.27pt).
```
$ dvisvgm -d2 frktest
pre-processing DVI file (format version 2)
  processing page 1
  graphic size: 398.34pt x 456.34pt (396.85bp x 454.63bp)
  output written to frktest.svg
1 of 1 page converted in 0.0754669 seconds
```
Fixed the detection of MIME types depending of file name suffixes.
Several small code improvements.

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