Initial work on commits list using paging library

app/build.gradle

@@ -34,6 +34,7 @@ configurations {
 dependencies {
     def lifecycle_version = "2.2.0"
     final def markwon_version = '4.2.1'
+    def paging_version = "2.1.2"
 
     implementation fileTree(include: ['*.jar'], dir: 'libs')
     implementation "androidx.appcompat:appcompat:1.1.0"
@@ -79,4 +80,5 @@ dependencies {
     implementation "com.github.chrisbanes:PhotoView:2.3.0"
     implementation "com.pddstudio:highlightjs-android:1.5.0"
     implementation "com.github.barteksc:android-pdf-viewer:3.2.0-beta.1"
+    implementation "androidx.paging:paging-runtime:$paging_version"
 }