Refactored adding new identities

- add deterministic identities
- import existing identities

app/src/main/res/layout/fragment_import_input.xml

@@ -0,0 +1,60 @@
+<?xml version="1.0" encoding="utf-8"?>
+<!--
+  ~ Copyright 2016 Christian Basler
+  ~
+  ~ Licensed under the Apache License, Version 2.0 (the "License");
+  ~ you may not use this file except in compliance with the License.
+  ~ You may obtain a copy of the License at
+  ~
+  ~     http://www.apache.org/licenses/LICENSE-2.0
+  ~
+  ~ Unless required by applicable law or agreed to in writing, software
+  ~ distributed under the License is distributed on an "AS IS" BASIS,
+  ~ WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~ See the License for the specific language governing permissions and
+  ~ limitations under the License.
+  -->
+
+<android.support.constraint.ConstraintLayout
+    xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:layout_marginBottom="64dp"
+    android:layout_marginEnd="16dp"
+    android:layout_marginStart="16dp"
+    android:layout_marginTop="16dp">
+
+    <TextView
+        android:id="@+id/description"
+        android:layout_width="360dp"
+        android:layout_height="wrap_content"
+        android:text="@string/import_input_description"
+        app:layout_constraintLeft_toLeftOf="parent"
+        app:layout_constraintTop_toTopOf="parent"/>
+
+    <EditText
+        android:id="@+id/wif_input"
+        android:layout_width="match_parent"
+        android:layout_height="0dp"
+        android:layout_marginTop="24dp"
+        android:gravity="start|top"
+        android:hint="@string/wif_string"
+        android:inputType="textMultiLine|text"
+        app:layout_constraintBottom_toTopOf="@+id/next"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toBottomOf="@+id/description"/>
+
+    <Button
+        android:id="@+id/next"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginBottom="8dp"
+        android:layout_marginTop="8dp"
+        android:text="@string/next"
+        android:textColor="@color/colorAccent"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintRight_toRightOf="parent"/>
+
+</android.support.constraint.ConstraintLayout>