[HarfBuzz] [PATCH] Added an Indic shaper

[suzuki toshiya]

I'm sorry for commenting the postscript comment, yet I've
not checked the implementation in your patch.

Tom Hacohen wrote:
> P.S
> Why don't we use the "init" feature by default?

Although "init" feature is not forbidden in Indic scripts,
basic Indic shaping algorithm is defined without "init"
feature, like,
http://www.microsoft.com/typography/otfntdev/devanot/features.aspx

I guess the usage of "init" for script support is for the
script that the presentation forms of a character can be
classified into 4 types: initial/medial/final/isolated,
aslike Arabic. The classification of the presentation forms
of Indic character might be different from 4-form model.

Regards,
mpsuzuki