Mechanical refinement to build cmd files

build.cmd can take an optional target name like Compile or several targets in order with quotes like "Compile,Package"
clicktobuild.cmd will detect when the sdk env variable is not present, and vs2k8 is, and it will run the vs batch to initialize environment for calling msbuild

--HG--
branch : dev

build.cmd

@@ -1,2 +1,2 @@
-if .%1.==.. build Build
-msbuild /t:%1
+if "%~1"=="" build Build
+msbuild /t:%~1