Detour CreateProcess() and LoadLibrary() for DLL injection chaining.

This implements the main part of #25. It still leaves a few locale problems unsolved, though.
Add ReadProcessString().
Add GetRemoteProcAddress().
Detour CreateRemoteThread() to apply the thcrap detours to newly injected DLLs.

That's it! thcrap can now be fully chained to other patches that use DLL injection, independent of the system locale. Of course, the target patch could always be deliberately coded to prevent that. But vpatch generally isn't, and vpatch_th06.dll requires a different solution anyway.

Closes #25.