TODO
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* added embeddable resources (fonts, textures)
* added GStreamer bridge for Unix
* added support for more video colorspaces (YUV2, YV12)
* added support for other subtitle formats (SRT, MicroDVD, ?)
* rewrote text layout (for context-sensitive characters, right-to-left languages, ruby text, draw outlines->fill)
* added wrapping modes

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v0.0.4
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* fixed gaps in text paths
* fixed wrong animation progress
* added aa style tag
* changed SSB format [v0 -> v1]
	- shortened style tag names

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v0.0.3
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* fixed no line drawing by zero alpha
* fixed hang bug on wrong path begin
* added UTF-8 BOM ignore
* increased cache size to 64
* changed font size to floating point
* added 2-color/alpha gradients

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v0.0.2
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* fixed crash on some blending modes & animated tags
* fixed wrong vertical text position on fontname/-size change
* added mode value 'boxed'
* added style tag kmode
* sped up texturing
* improved blurring quality & performance
* added version getter to C interface
* ported to Unix (C, Aegisub, Vapoursynth)