Optimizations (#1680)

* Optimizations

1) Some headers simplified for better compilation time
2) Some templates simplified for smaller executable size
3) Eliminate std::future to fix compilation for mingw64
4) PKG installation can be cancelled now
5) cellGame fixes
6) XAudio2 fix for mingw64
7) PPUInterpreter bug fixed (Clang)

* any_pod<> implemented

Aliases: any16, any32, any64
rsx::make_command fixed

Utilities/File.h

@@ -161,9 +161,6 @@ namespace fs
 		// Open memory for read
 		explicit file(const void* ptr, std::size_t size);
 
-		// Open vector
-		explicit file(std::vector<char>& vec);
-
 		// Check whether the handle is valid (opened file)
 		explicit operator bool() const
 		{
@@ -214,7 +211,7 @@ namespace fs
 			return m_file->write(buffer, count);
 		}
 
-		// Change current position, returns previous position
+		// Change current position, returns resulting position
 		u64 seek(s64 offset, seek_mode whence = seek_set) const
 		{
 			if (!m_file) xnull();