[lltx] Microtype update

[Élie Roux]

Dear Robert,

Philipp Gesang and I are currently updating the luaotfload and fontspec 
packages for LuaTeX, most certainly for TeXLive 2013. This is quite a 
heavy update and it implies some backward-incompatible changes in the 
lua structures of the font files.

The attached patch microtype-patch.diff make microtype compatible with 
the new luaotfload (TeXLive 2013) and the old one (TeXLive 2009-2012).

Also, luatexbase is now really widespread and stable, while luatextra is 
deprecated, so the attached patch microtype-patch-luatexbase.diff makes 
microtype use luatexbase instead of luatextra. Also, luatexbase is 
really available everywhere so I made it a requirement, but feel free to 
do otherwise... I think it is safe though.

Please tell me your feeling about this. Do you think you could make an 
update for TeXLive 2013 (freezing on May 20th)?

Thank you very much,
-- 
Elie
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