Update docs 6

1. Added example of squish!
2. Added example of remove
3. Added example of remove!
4. Added test case for removal of multiple occurrences of pattern.
And yes indeed. There were whitespaces. Thanks @eileencodes 
![screen shot 2014-11-06 at 07 53 13](https://cloud.githubusercontent.com/assets/946527/4929996/4123e78e-655c-11e4-810e-f2793c1c6ad3.png)