Fix test/common for NamedLock by starting a separate process so that we can
really test conflicting locks.

The abbreviated name doesn't work for 32-bit compiles!

Use PLATFORM the way that MSBuild wants it to be used, and add Win64 to the
CMake Generator name using PowerShell instead.

Hopefully will enable Win64 builds. At least it works for me on a VM.

Should solve the conflict between read-only checks and housekeeping which
caused test failures.

This one has the "Potential" to be come the permanent database, by calling
Commit() on it. Soon there will be real "temporary" databases which live in the
temp directory and cannot be committed.

Attempt to fix 32-bit and 64-bit cmake builds

Build it into the binary, and use it for creating packages.

Build x86 and x64 for Windows using AppVeyor