README.md: add link to emscripted version.
Update README.md for emscripten
Remove OpenMP support

Emscripten doesn't support OpenMP.
Drop SDL_EventState() calls

These don't really do a whole lot, and cause Emscripten problems (SDL
1.3 vs 2.0), so drop 'em.
Use internal linkage: s/^inline/static inline/

Emscripten has problems with just "inline" functions, but seems to
accept "static inline".
Implement our own RNG: lame_rand()

Emscripten doesn't seem to like lrand48() very much, so we implement our
own random number generator. Note that we only use one bit from the RNG,
and we want it to be a good bit, so we shift the output of lame_rand()
before returning it.
Break out main loop to game_iter()

Quick 'n dirty: move important variables out to globals, and move inside
of while loop out to game_iter() function.
Add actual Emscripten support

Use #ifdef-s to separate Emscripten code from native.

Also lock/unlock surface before writing, since it doesn't work for me
otherwise.
Shrink from 1280x720 to 640x360 if emscripting

Javascript is still slower than native, especially without OpenMP
support.
Fix typos in README.md

s/Game_of_Life/Game_of_Ice/i
Makefile hack for Emscripten support: goi.js

Add goi.js target to support Emscripten. Using 'emmake make goi.js'
works for me: if it starts breaking, I'll look into writing a less ugly
hack.
Add goi.html and document it

Add a minimal HTML page to load goi.js, and update README.md with
instructions on how to make it work.
Add extra margin to #seeAlso