exclude demo in package, updated readme

Author: d2phap

.npmignore

@@ -0,0 +1,4 @@
+# Exclude files/folders for publishing package
+
+demo/
+

README.md

@@ -1,2 +1,55 @@
-# vue-file-selector
+# Vue File selector
 File selector component that supports drag-n-drop for @vuejs
+
+## Install
+Run the command
+```
+npm i fluent-reveal-effect@latest
+```
+
+NPM package: https://www.npmjs.com/package/vue-file-selector
+
+## Usage
+
+#### Declare the plugin
+```js
+// import the library
+import FileSelector from 'vue-file-selector';
+
+// then use it!
+Vue.use(FileSelector);
+```
+
+### Use in Vue file
+```html
+<template>
+  <div>
+    My App.vue comp
+
+    <file-selector
+      accept-extensions=".zip"
+      :height="300"
+      @validate="validate"
+      @change="change"
+    >
+      hahahah
+    </file-selector>
+  </div>
+</template>
+
+<script>
+export default {
+  name: 'App',
+  methods: {
+    validate(result, files) {
+      console.log('Validation result: ' + result);
+    },
+
+    change(files) {
+      console.log('Selected files: ', files);
+    },
+  },
+};
+</script>
+```
+