fix cmake quoting

A few parameters (like "${PROJECT_BINARY_DIR}/lws_config.h" and "${PROJECT_SOURCE_DIR}/lib") are passed to CMake commands in your build script without enclosing them by quotation marks. I see that these places will result in build difficulties if the contents of the used variables will contain special characters like spaces.

Signed-off-by: Markus Elfring <markus.elfring@web.de>
make header protection unique remove __prefix

Signed-off-by: Markus Elfring <markus.elfring@web.de>
v1.2.3 changelog update

Signed-off-by: Andy Green <andy.green@linaro.org>
trac41 WIN32 add wsockcompat.h

Using Windows 7 64 bit, cloned repo on 20130926. Using Qt creator and Microsoft Visual C++ Compiler 9.0 (x86).
Result (errors from compile output): D:\Projects\CDPStudioAPI\libwebsockets_orig\lib\client-handshake.c:87: error: C2065: 'EALREADY' : undeclared identifier
D:\Projects\CDPStudioAPI\libwebsockets_orig\lib\client-handshake.c:87: error: C2065: 'EINPROGRESS' : undeclared identifier
Possible solution is to use wsockcompat.h (compatibility header for using EALREADY, EINPROGRESS etc in older versions of Windows SDK). Compiled fine when I #included wsockcompat.h into client-handshake.c

Reported-by: mart22n via Trac 41
Signed-off-by: Andy Green <andy.green@linaro.org>