fix thinkboard.json (to lowercase filename)

Author: extracold1209

app/modules/thinkboard.json

@@ -5,14 +5,14 @@
         "ko": "씽크보드"
     },
     "platform": ["win32", "darwin"],
-    "icon": "ThinkBoard.png",
-    "module": "ThinkBoard.js",
+    "icon": "thinkboard.png",
+    "module": "thinkboard.js",
     "url": "http://www.thinkfunedu.com",
-	"email": "[email protected]",	
+	"email": "[email protected]",
     "video": "https://goo.gl/okk8s9",
     "driver": {
 		"win32-ia32": "CDM21228_Driver/CDM21228_Setup.exe",
-		"win32-x64": "CDM21228_Driver/CDM21228_Setup.exe",		
+		"win32-x64": "CDM21228_Driver/CDM21228_Setup.exe",
         "darwin-x64": "Mac_OSX_VCP_Driver/SiLabsUSBDriverDisk.dmg"
     },
     "select_com_port": true,