Fixes for the Lua integration + Websocket for Lua

Features:

* Fixes for Lua Server Pages, as described within the google groups thread.

* Added support for plain Lua Scripts, and an example script.

* A completely new, and more illustrative websocket example for C.

(Remark: VS2012\ex_websocket\ex_websocket.vcxproj might require an minor changes for Visual Studio 2012, I used it in VS2010 and added one file. The setting <PlatformToolset>v110_xp</PlatformToolset> in Line 27 and 39 got lost this way and I cannot enter it in the VS2010 GUI. I am not sure if this line is actually required at all.).


* An implementation of "Websocket for Lua", which allows to configure an optional websocket_root directory, incl. URL rewriting. Added an example. The Lua interface may change if the threading model changes.

* Update of SQLite3 to 3.8.1.

* Add "date" header field to replies, according to the requirements of RFC 2616 (the HTTP standard), Section 14.18



-----

All compiled and tested on Windows(XP, 7), but not on Linux, MacOS.