VM: Three new special objects added to keep track of the builds version ...

Often, when troubleshooting, it is really useful to know Factor's version number, compiler and cpu architecture. For example, when debugging why some dll won't load and then you slap your head because you realize you have a 32bit build of Factor and the dll is a 64bit one. Or when you change something in the vm, recompile Factor and you try again, it's the same thing and you get very frustrated. Then you realize you were using the installed binary all along so of course you couldn't see the changes! In such cases seeing the build timestamp in the banner when Factor loads is very useful:
![banner](https://f.cloud.github.com/assets/142475/1000753/07b64300-0a56-11e3-9985-f8621f8332f1.png)
Also useful when sending in bug reports. I used the same format and data as is displayed by Python's banner. But exactly how it looks isn't important I think, just that the data is there.

I've tested on Windows and Linux but not on Mac. Hopefully it should work without problems there as the build process is the same as on Linux.