epeli/underscore.string — pull request #125 by ihardware (2012-05-28 10:38:38+00:00)
Title: Add swapCase function

[In Python we have ] (http://docs.python.org/library/string.html#string.swapcase) swapcase function:
```python
"hELLO".swapcase() # => "Hello"
"abcABC".swapcase() # => "ABCabc"
```
With this pull request I added an analogue to underscore.string.