First round of translating the code comments and error messages to English. Most of the heavy lifting was done by Google translate

src/raspberrypi/ctapdriver.cpp

@@ -8,7 +8,7 @@
 //
 //	Imported NetBSD support and some optimisation patch by Rin Okuyama.
 //
-//	[ TAPドライバ ]
+//	[ TAP Driver ]
 //
 //---------------------------------------------------------------------------
 
@@ -206,4 +206,4 @@ int FASTCALL CTapDriver::Tx(BYTE *buf, int len)
 
 	// 送信開始
 	return write(m_hTAP, buf, len);
-}
+}