(API Change) libobs: Add global module config path

API Changed:
---------------------------
From:
- bool obs_startup(const char *locale, profiler_name_store_t *store);

To:
- bool obs_startup(const char *locale, const char *module_config_path,
		profiler_name_store_t *store);

Summary:
---------------------------
This allows plugin modules to store plugin-specific configuration data
(rather than only allowing objects to store configuration data).  This
will be useful for things like caching data, for example looking up and
storing ingests from remote (rather than storing locally), or caching
font data (so it doesn't have to build a font cache each time), among
other things.

Also adds a module-specific directory for the UI

test/win/test.cpp

@@ -82,7 +82,7 @@ static void CreateOBS(HWND hwnd)
 	RECT rc;
 	GetClientRect(hwnd, &rc);
 
-	if (!obs_startup("en-US", nullptr))
+	if (!obs_startup("en-US", nullptr, nullptr))
 		throw "Couldn't create OBS";
 
 	struct obs_video_info ovi;