Further header & precompiled cleanup, fix no-PCH builds.

GUIObjectBase is made a IGUIObject* to avoid including those headers
un-necessarily. Subsequent diffs ought to clean up the various of
pointers for that with a similar type with reference semantics.

Also:
- Add standard C and C++ headers (mostly cstring for memcpy, string and
vector) where needed.
- Swap out some includes for forward declarations
- Clean up un-necessary boost includes in precompiled and other headers.
- Clean up precompiled headers, including fewer things.
- Move ACPI to the windows-specific folder as it's included there only
and mostly specific to that platform.

Thanks Stan for the testing.

Differential Revision: https://code.wildfiregames.com/D3129
This was SVN commit r24352.

source/simulation2/system/ComponentManagerSerialization.cpp

@@ -32,14 +32,14 @@
 
 #include "ps/CLogger.h"
 
-std::string SerializeRNG(const boost::rand48& rng)
+std::string SerializeRNG(const boost::random::rand48& rng)
 {
 	std::stringstream s;
 	s << rng;
 	return s.str();
 }
 
-void DeserializeRNG(const std::string& str, boost::rand48& rng)
+void DeserializeRNG(const std::string& str, boost::random::rand48& rng)
 {
 	std::stringstream s;
 	s << str;