AppVeyor: use a .bat file now

- Changes in platform configuration, x86 breaks the build
- Solution file does not contain platform for Any CPU,fixing it to Win32
- Added Multiple solutions to appveyor configuration file
- Added batch script for VS2010 builds
- Added fixes to appveyor.bat file and appveyor.yml
- Fixes for Platform and Configuration in appveyor.bat
- Fixed windows exit code, Appveyor reports exit on succesful build
- Multiple Builds in same platform and configuration,fixed it
diff --git a/appveyor.yml b/appveyor.yml
index af5d08f..598db92 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -5,6 +5,10 @@
 platform:
 - x64
 - Win32
+build:
+  project: msvc\libusb_2013.sln
+  parallel: true
+  verbosity: detailed
 environment:
   matrix:
   - libusb_2015: msvc\libusb_2015.sln
@@ -19,4 +23,4 @@
 
     msbuild %libusb_2012% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
 
-    msbuild %libusb_2010% /logger:"C:\Program Files\AppVeyor\BuildAgent\Appveyor.MSBuildLogger.dll"
+    msvc/appveyor.bat