Add datepicker view as placeholder for calendar view

datepicker.js

@@ -0,0 +1,35 @@
+import React, { Component } from 'react'
+import {
+  View, Button, DatePickerAndroid
+} from 'react-native'
+import moment from 'moment'
+import * as styles from './styles'
+
+export default class datePickView extends Component {
+  constructor(props) {
+    super(props)
+  }
+
+  async pickDate() {
+    const result = await DatePickerAndroid.open({
+      date: new Date()
+    })
+    if (result.action !== DatePickerAndroid.dismissedAction) {
+      const navigate = this.props.navigation.navigate
+      // continue here and actually make that view
+      navigate(
+        'dayView',
+        { date: moment(new Date(result.year, result.month, result.day)) }
+      )
+    }
+  }
+
+  render() {
+    return (
+      <View style={styles.container}>
+        <Button onPress={ this.pickDate.bind(this) } title="pick a date" />
+      </View>
+    )
+  }
+}
+