64-bit support

[KaelaSavia]

With TF2 including 64-bit binaries for linux as part of beta, it might be worthwhile to try adding initital 64-bit support

[ClaudiuHKS]

Yes, now it's needed for CSS and DODS too. x64.

[AtomicTEM]

https://github.com/idk1703/stripper-source

There is an x64 version of stripper now.