Rework & cleanup CMake project files

- Building with CMake for development is now actually sane
- Split deps into projects and extra files
- Building against external deps should still work but needs testing
- Can now build out of the box without further adjustments as long as SDL(2) is found properly
- Build Lua in C++ mode (so it can use exceptions instead of setjmp/longjmp)
  - Unfortunately we need to enable exceptions for this :(

- Remove these defines:
  * AQUARIA_BUILD_SCENEEDITOR (now always on)
  * AQUARIA_BUILD_CONSOLE (now always on)
  * BBGE_BUILD_ACHIEVEMENTS_INTERNAL (now always on unless BBGE_BUILD_STEAMWORKS is defined)
  * BBGE_BUILD_OPENGL_DYNAMIC (now always on, define BBGE_BUILD_OPENGL_STATIC if needed)
  * BBGE_BUILD_FMOD_OPENAL_BRIDGE (now always on)
- BBGE_BUILD_STEAMWORKS is not actually implemented (any volunteers?)
- Prepare later removal of SDL & the old vc90 project from the repo. See #74 for extra notes.

BBGE/GLLoad.cpp

@@ -1,7 +1,16 @@
+#include "GLLoad.h"
+
+#ifdef BBGE_BUILD_OPENGL_STATIC
+
+bool lookup_all_glsyms() { return true; }
+bool void unload_all_glsyms() { return false; }
+
+#else
+
 #include "Base.h"
 
 #include "RenderBase.h"
-#include "GLLoad.h"
+
 #include <sstream>
 
 #ifdef GLAPIENTRY
@@ -16,7 +25,6 @@
 
 #include <GL/glext.h>
 
-#ifdef BBGE_BUILD_OPENGL_DYNAMIC
 
 PFNGLGENERATEMIPMAPEXTPROC glGenerateMipmapEXT = NULL;
 
@@ -89,6 +97,7 @@ static bool lookup_glsym(const char *funcname, void **func)
 bool lookup_all_glsyms()
 {
 	bool retval = true;
+
 #define GL_FUNC(ret,fn,params,call,rt) \
 	if (!lookup_glsym(#fn, (void **) &p##fn)) retval = false;
 #include "OpenGLStubs.h"
@@ -210,4 +219,4 @@ void unload_all_glsyms()
 	glUniform4ivARB           = NULL;
 }
 
-#endif // BBGE_BUILD_OPENGL_DYNAMIC
+#endif // BBGE_BUILD_OPENGL_STATIC