Cosmetic changes to show git hash, architecture and compiler on admsXml call.

Let `admsXml` show more information about the git version and compilation environment.

Something like:

```
~/git/ADMS_upverter $ admsXml/admsXml 
[usage..] admsXml-2.3.0 (f78ebc1) Oct 24 2013 23:57:55 (os=DARWIN compiler=GCC)
[...]
```