Update README.md

Author: kevinongko

README.md

@@ -6,6 +6,8 @@
 
 Input field component to display currency value based on [Vue](https://vuejs.org/).
 
+``Works with Vue 2.*``
+
 ## Installation
 
 ```sh
@@ -17,6 +19,7 @@ $ npm install vue-numeric --save
 
 ![screen shot 2016-12-08 at 2 19 31 pm](https://cloud.githubusercontent.com/assets/15880638/21001265/f2322438-bd51-11e6-8985-f31a45702484.png)
 
+### Quick example
 
 ```vue
 <template>
@@ -42,6 +45,55 @@ export default {
 
 ```
 
+### Currency prefix
+
+adding currency prefix to the input by using `currency` props.
+
+```vue
+<vue-numeric currency="$"></vue-numeric>
+```
+
+### Minimum & maximum constraint
+
+Limit minimum and maximum input by using `min, max` props.
+
+- `min` default to `0`.
+- `min, max` accept `String` and `Number`.
+
+```vue
+<vue-numeric min="2000" v-bind:max="10000"></vue-numeric>
+```
+
+### Disable/enable minus value
+- `minus` default to `true`.
+
+```vue
+<vue-numeric v-bind:minus="false"></vue-numeric>
+```
+
+### Enable decimal value
+By default the decimal value is disabled, to use decimal value add `precision` props.
+- `precision` accept `String` and `Number` numeric value.
+
+```vue
+<vue-numeric v-bind:precision="2"></vue-numeric>
+```
+
+### Thousand separator
+- Default thousand separator's symbol is `,`.
+- Use `separator` props to change separator's symbol.
+- `separator` only accept either `,` or `.` value.
+- When using `.` separator symbol, to input decimal value use `,` and vice versa.
+
+```vue
+<vue-numeric separator="."></vue-numeric>
+```
+
+### Input placeholder when empty
+```vue
+<vue-numeric placeholder="only number allowed"></vue-numeric>
+```
+
 ## Props
 ```js
  /**