Merge pull request #122 from Gentatsu/separate_launcher

Separate launcher batch file so hosts file does not need editing.

README.md

@@ -113,6 +113,7 @@ zoffline can be installed on the same machine as Zwift or another local machine.
   * Append this line: ``<zoffline ip> us-or-rly101.zwift.com secure.zwift.com cdn.zwift.com launcher.zwift.com``
     <br />(Where ``<zoffline ip>`` is the ip address of the machine running zoffline. If
     it's running on the same machine as Zwift, use ``127.0.0.1`` as the ip.)
+* If you have the helper scripts, open the __ip_address.txt__ file and change it to the zwift server ip. Launch the __launch.bat__ script as admin to start Zwift. This way, if you use the normal Zwift launcher, it'll go to Zwift's servers, and use this as a standalone launcher. 
 
 Why: We need to redirect Zwift to use zoffline and convince Windows and Zwift to
 accept zoffline's self signed certificates for Zwift's domain names. Feel free

scripts/ip_address.txt

@@ -0,0 +1 @@
+127.0.0.1

scripts/launch.bat

@@ -0,0 +1,20 @@
+SET hostspath=%windir%\System32\drivers\etc\hosts
+SET tmp_host=%windir%\temp\hosts
+
+@ECHO Moving host file to tmp location...
+
+COPY %hostspath% %tmp_host% /y >nul
+
+SET/p ip_address=<%~dp0\ip_address.txt
+
+ECHO .>>%hostspath%
+ECHO %ip_address% us-or-rly101.zwift.com secure.zwift.com cdn.zwift.com launcher.zwift.com >> %hostspath%
+
+START /d "C:\Program Files (x86)\Zwift" ZwiftLauncher.exe
+
+PAUSE
+
+@ECHO Moving host file back...
+
+COPY %tmp_host% %hostspath% /y >nul
+