config_load API (update)

I committed more stuff, basically I cleaned up quite a bit of the config_load() code. It's much leaner, and it now respects the force_compile and compile_check flags. It no longer loads the Config_Load class if it has cached data to work with. I also sped things up by moving the files from the cache directory to the templates_c directory and making it a real PHP script that gets included (and therefore accelerated). If you're using PHP 4.2.0 or later, it's even faster using var_export() to dump the config data out in a variable structure, otherwise it will serialize/unserialize it. Monte