diff --git a/.idea/caches/build_file_checksums.ser b/.idea/caches/build_file_checksums.ser
index bd586ccc..751a6284 100644
Binary files a/.idea/caches/build_file_checksums.ser and b/.idea/caches/build_file_checksums.ser differ
diff --git a/.idea/dictionaries/Stardust.xml b/.idea/dictionaries/Stardust.xml
index 56bd1478..09ec5769 100644
--- a/.idea/dictionaries/Stardust.xml
+++ b/.idea/dictionaries/Stardust.xml
@@ -4,6 +4,7 @@
       <w>autojs</w>
       <w>capturer</w>
       <w>dismissable</w>
+      <w>downvote</w>
       <w>fileprovider</w>
       <w>flowable</w>
       <w>imgproc</w>
@@ -16,6 +17,7 @@
       <w>storages</w>
       <w>tasker</w>
       <w>uncheck</w>
+      <w>upvote</w>
     </words>
   </dictionary>
 </component>
\ No newline at end of file
diff --git a/app/build.gradle b/app/build.gradle
index 469cf22f..a7085fde 100644
--- a/app/build.gradle
+++ b/app/build.gradle
@@ -99,6 +99,8 @@ dependencies {
         exclude group: 'com.android.support', module: 'support-annotations'
     })
     testImplementation 'junit:junit:4.12'
+    // Kotlin
+    implementation "org.jetbrains.kotlinx:kotlinx-coroutines-android:1.0.1"
     // Android Annotations
     annotationProcessor "org.androidannotations:androidannotations:$AAVersion"
     implementation "org.androidannotations:androidannotations-api:$AAVersion"
@@ -148,6 +150,7 @@ dependencies {
     implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
     implementation 'com.squareup.retrofit2:converter-gson:2.3.0'
     implementation 'com.jakewharton.retrofit:retrofit2-rxjava2-adapter:1.0.0'
+    implementation 'com.jakewharton.retrofit:retrofit2-kotlin-coroutines-adapter:0.9.2'
     //Glide
     implementation('com.github.bumptech.glide:glide:4.8.0', {
         exclude group: 'com.android.support'
diff --git a/app/src/main/AndroidManifest.xml b/app/src/main/AndroidManifest.xml
index fa798b90..2b708db8 100644
--- a/app/src/main/AndroidManifest.xml
+++ b/app/src/main/AndroidManifest.xml
@@ -106,7 +106,9 @@
             android:name=".ui.user.RegisterActivity_"
             android:windowSoftInputMode="adjustResize"/>
         <activity android:name=".ui.user.WebActivity_"/>
-        <activity android:name=".ui.project.BuildActivity_"/>
+        <activity
+            android:name=".ui.project.BuildActivity_"
+            android:configChanges="orientation|screenSize"/>
         <activity android:name=".ui.project.ProjectConfigActivity_"/>
         <activity android:name=".ui.log.LogActivity_"/>
         <activity android:name=".ui.doc.DocumentationActivity_"/>