nucleic/atom — pull request #23 by blink1073 (2013-10-26 22:22:25+00:00)
Title: Added StrPromote behavior

Handles int, long, and unicode promotions.

```python
from atom.api import Atom, Str

class Test(Atom):
s = Str(strict=False)

t = Test()
for value in [0, long(10), u'20']:
t.s = value
assert t.s == str(value)
```