Adds IsDrive to FileUtil for win32,

Adds booting from drive to gui. disabled as it is currently too slow unless it is a virtual drive

Changes DriveUtil to start checking at D: as it is unlikely that a, b, or c will be a cd/dvd drive

Addes DriveBlob functions, untested on linux/osx probably needs more work

Removes duplicate message from EXI_DeviceMemoryCard.cpp when creating a brand new memcard



git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2345 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Common/Src/FileUtil.cpp

@@ -69,6 +69,18 @@ bool Exists(const char *filename)
 	return (result == 0);
 }
 
+bool IsDisk(const char *filename)
+{
+#ifdef _WIN32
+	std::string copy = filename;
+	if (copy.size() < 4 && copy.c_str()[1] == ':')
+		return true;
+#else
+	// TODO: add linux \ osx 
+#endif
+	return false;
+}
+
 bool IsDirectory(const char *filename)
 {
 	struct stat file_info;