React Native Dismissable Numeric Keyboard

Add extra button to numeric keyboard to allow user dismiss it.
To enable this integration TextInput component has to contain keyboardType and returnKeyType props.

This supports only iOS as this module does not contain any Android file.

##Installation
``
npm install --save react-native-dismissable-numeric-keyboard
rnpm link
`

##Sample usage in code
`
autoCapitalize={ true }
autoCorrect={ true }
placeholder="Some placeholder text"
returnKeyType={ returnKeyType }
keyboardType="numeric"
/>
`

where returnKeyType` can be one of supported return key types.

#### returnKeyType values and mapping
- done - Done
- default - Save
- search - Search
- send - Add
- go - Edit

##Changelog
+ v0.0.1

First release