Fix issue #2: There is no configure binary and get some statements while building it.

There's no reason to keep a configure binary in source control. I added the
necessary steps to create it in the README.
Add *.sln, *.vcproj files to automake for "make dist" to work.

The .am files contained obsolete data (to include libcpuid.sln/libcpuid.vcproj
in a dist). These files are now in libcpuid_vc71.* and libcpuid_vc9.* flavours,
thus this change. "make dist" now works.