[BRANCH] Bidi support.

[Vladimir 'φ-coder/phcoder' Serbinenko]

Hello, all. I'm here to announce initial bidi support in one of my
branches, namely people/phcoder/bidi. For now it has following limitation:
-Only gfxmenu support. So no support in terminal (even not in gfxterm)
-No line wrapping (not necessary currently since draw_string draws only
one line)
-No mirroring. So e.g. parenthesis are in wrong direction.
-No combining marks (not a bidi issue actually).
-No shaping. So no Arabic support.
These drawbacks will be addressed when time permits. When bidi matures a
bit it will be available in experimental.
I'm attaching screenshot (thanks directhex for nice gfxmenu theme) (I
have only some basics in Hebrew and Arabic so this and subsequent bidi
screenshots may contain linguistic mistakes)

-- 
Regards
Vladimir 'φ-coder/phcoder' Serbinenko

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