Update .appveyor.yml

.appveyor.yml

@@ -2,6 +2,8 @@ os:
   - Visual Studio 2013
 
 install:
+  - git submodule init
+  - git submodule update
   - third/bx/tools/bin/windows/genie --file=genie\genie.lua --with-luajit --with-openal --with-bullet --with-tools vs2013
 
 configuration:
@@ -10,4 +12,4 @@ configuration:
   - release
 
 build:
-  - project: build/projects/vs2013/crown.sln
+  project: build/projects/vs2013/crown.sln