Remove preview directory (#292)

* rename -- remove preview directory. Fix up associated project files that used relative paths to remove one directory (..\)

ClickOnceWrapper had a problem, in that its dependson was pre-run instead of pre-build, which means it had to have run successfully already; this was fixed.

* fixup of project files

* update paths referenced in README.md

* update CODEOWNERS and root README.md to point to MSIXCore README.md

CODEOWNERS

@@ -2,4 +2,4 @@
 * @msftrubengu @ranm-msft @johnmcpms 
 
 # MsixCoreInstaller owners
-/preview/MsixCore/ @wcheng-msft @jyvenugo @sarjanas-msft
+/MsixCore/ @wcheng-msft @jyvenugo @sarjanas-msft

MsixCore/ClickOnceWrapper/msixmgrClickOnceWrapper.csproj

@@ -91,6 +91,7 @@
     <ErrorReport>prompt</ErrorReport>
     <CodeAnalysisRuleSet>MinimumRecommendedRules.ruleset</CodeAnalysisRuleSet>
     <Prefer32Bit>true</Prefer32Bit>
+    <GenerateSerializationAssemblies>Off</GenerateSerializationAssemblies>
   </PropertyGroup>
   <PropertyGroup Condition="'$(Configuration)|$(Platform)' == 'Debug|x86'">
     <DebugSymbols>true</DebugSymbols>
@@ -193,7 +194,7 @@
   </ItemGroup>
   <Import Project="$(MSBuildToolsPath)\Microsoft.CSharp.targets" />
   <PropertyGroup>
-    <PrepareForRunDependsOn>$(PrepareForRunDependsOn);CreateLocOutputDirectoryStructure</PrepareForRunDependsOn>
+    <PrepareForBuildDependsOn>$(PrepareForBuildDependsOn);CreateLocOutputDirectoryStructure</PrepareForBuildDependsOn>
     <PreBuildEvent>
     </PreBuildEvent>
   </PropertyGroup>

MsixCore/README.md

@@ -20,7 +20,7 @@ Clone the msix-packaging repository to a local workspace and build it x64 (see h
 ```
 Makewin.cmd x64 -mt
 ```
-Open the msix-packaging/preview/MsixCore/msixmgr.sln file in Visual Studio 2017. Build the msixmgr project in release/x64 to create the msixmgr.exe
+Open the msix-packaging/MsixCore/msixmgr.sln file in Visual Studio 2017. Build the msixmgr project in release/x64 to create the msixmgr.exe
 
 ## Using a MSI Setup Project
 Once the msixmgr project has been built, the MsixMgrWix project can be built. The MsixMgrWix project has an additional dependency on the GetMsixmgrProducts project, which builds a custom action for the MSI package.
@@ -43,7 +43,7 @@ All MSIXCore.Desktop apps will deploy to the server (with a gui) based operating
 
 ## Using the Command Line
 The executables can also be manually deployed to a Windows 7 SP1 or higher machine without using the MSI setup project. Place the msix.dll and msixmgr.exe in the same location. 
-Sample packages can be found at msix-packaging/preview/MsixCore/tests; these can be copied over to a Windows 7 SP1 or higher machine and installed, although they may require adding the APPX_TEST_ROOT.cer (in the same tests folder) to the trusted store in order to install. Some of these packages are large and are stored using git lfs (Large File Storage).
+Sample packages can be found at msix-packaging/MsixCore/tests; these can be copied over to a Windows 7 SP1 or higher machine and installed, although they may require adding the APPX_TEST_ROOT.cer (in the same tests folder) to the trusted store in order to install. Some of these packages are large and are stored using git lfs (Large File Storage).
 
 ```
 certutil -addstore root APPX_TEST_ROOT.cer