websocket: Split file in 2 parts.

websocket.h with generic functions, websocket.c with specific parts.
fbserver: WebSocket server to serve X11 framebuffer content
croutonfindnacl: Helper script to find NaCl process and shm.
findres: Helper script to find best resolution.
xorg-dummy.conf: Xorg configuration for Xorg dummy server.
criat: crouton-in-a-tab NaCl C++ source code
criat: Javascript/HTML helper
Performance measurement tools and other temp scripts.
targets/common, compile: Insert include files as needed.
xiat: target
croutoncyle: Detect xiat-based windows

We rely on a new xprop CROUTON_XMETHOD to detect xiat-based displays.
xinitrc-wrapper: Start fbserver
croutoncycle can open xiat windows.
fbserver: Use mmap, check signature before writing.
More default resolution. I think it is better to generate them based on screen resolution.
xiat: No scrollbars
Only scale cursor as needed.
Makefile: compile with -Os as well

Good to spot strange bugs that only appear with certain flags.
Lots of small cosmetic polishes.
croutoncycle: Detect current xiat window, and switch accordingly.