More cleanup, add native filepicker

Code cleanup, add filepicker lib to avoid issues with stock file apps.

app/build.gradle

@@ -14,6 +14,7 @@ android {
             enabled true
         }
     }
+
     buildTypes {
         release {
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
@@ -24,13 +25,18 @@ android {
         targetCompatibility JavaVersion.VERSION_1_8
     }
 }
+repositories {
+    maven {
+        url  "http://dl.bintray.com/lukaville/maven"
+    }
+}
 
 dependencies {
     compile fileTree(include: ['*.jar'], dir: 'libs')
     compile 'com.android.support:recyclerview-v7:24.2.0'
     compile 'com.android.support:cardview-v7:24.2.0'
     compile 'com.android.support:design:24.2.0'
-
+    compile 'com.nbsp:library:1.1'
     compile 'com.jakewharton:butterknife:8.4.0'
     annotationProcessor 'com.jakewharton:butterknife-compiler:8.4.0'
 }