assignment criteria for non-alphabetical symbols 

```
I could not understand the criteria you used to define which symbols are 
assigned to "1" key and which are assigned to "0" key. 
IMHO you should adopt a clear criterion, such as punctuation and parentheses 
assigned to 1 and math operators assigned to 0. Also, please do not forget the 
@ symbol!

```

Original issue reported on code.google.com by `giancarl...@gmail.com` on 1 Feb 2011 at 1:49
