STunney/BobArnson: WIXFEAT:4239

Add option to not extract the .msi when melting .wixpdbs. Don't leave temporary cabinet files behind (unless -notidy is in effect).
Per feedback. Restore Common.DeleteTempFiles and wrap it in AppCommon instead.
Get rid of warning RC4005 by passing in _USING_V110_SDK71_ to rc.exe when necessary.
Set Private to True for the references to
Microsoft.Deployment.WindowsInstaller.dll so that the project will still
build if that DLL is in the GAC.
Merge branch 'develop' of https://github.com/wixtoolset/wix3 into develop
Make sure all patches are cached in time.

Make sure all patches are cached even if they apply to earlier packages. If patches are authored later in the sequence, they may not be cached in time to be installed with an MSI already planned.
Merge pull request #13 from heaths/issue4241

Issue4241