adding tools verification to batch file

bin/create.bat

@@ -1 +1,15 @@
+@ECHO OFF
+IF NOT DEFINED JAVA_HOME GOTO MISSING
+FOR %%X in (java.exe ant.bat android.bat) do (
+    SET FOUND=%%~$PATH:X
+    IF NOT DEFINED FOUND GOTO MISSING
+)
 cscript %~dp0\create.js %*
+GOTO END
+:MISSING
+ECHO Missing one of the following:
+ECHO JDK: http://java.oracle.com
+ECHO Android SDK: http://developer.android.com
+ECHO Apache ant: http://ant.apache.org
+EXIT /B 1
+:END