Regnareb

Fixed some bugs with the loading of the xml files in some SVN environment, and I replaced some non-ASCII characters in some files.

Btw, why not write:
```python
        root = None
```
instead of:
```python
        root = "none"
```
on the line 62 of the file RegisterCustomShaders? 
I didn't had time to test it, but it would be way better.