Merge pull request jprichardson#170 from dr-dimitru/master

Fix broken links

- added `splitRight` and `splitLeft` method [jprichardson#153](jprich…

…ardson#153)

- add missing minified version

- update phpjs link in README [jprichardson#154](jprichardson#154)

- added `titleCase()` method [jprichardson#149](jprichardson#149)

- fix `underscore()` [jprichardson#148](jprichardson#148)

- fix [jprichardson#142](jprichardson#142)

- fix `extendPrototype()` method

3.1.1 / 2015-03-26

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- hack to work around the improper behavior (modifying of string prototype) of [shelljs](https://github.com/arturadib/shelljs)
see: [127](jprichardson#127), [128](jprichardson#128)

3.1.0 / 2015-03-21

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- added `stripLeft([chars])` and `stripRight([chars])` [jprichardson#133](jprichardson#133)

3.0.1 / 2015-03-16

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* bugfix `underscore()` for single letter "words" [jprichardson#131](jprichardson#131)

```js
S('oneAtATime').underscore().s //'one_at_a_time' instead of 'one_at_atime'
```

3.0.0 / 2014-12-08

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**BREAKING** Now `underscore()` behaves as one would expect.

```js
S('CarSpeed').underscore().s //'_car_speed'
```

now

```js
S('CarSpeed').underscore().s //'car_speed'
```

See [jprichardson#122](jprichardson#122) [jprichardson#98](jprichardson#98)