fix/add tests, update heatmap range, finish android release, add readme

Stop tracking gradle.properties

client/android/app/build.gradle

@@ -11,17 +11,29 @@ android {
         versionName "1.0"
         testInstrumentationRunner "androidx.test.runner.AndroidJUnitRunner"
         aaptOptions {
-             // Files and dirs to omit from the packaged assets dir, modified to accommodate modern web apps.
-             // Default: https://android.googlesource.com/platform/frameworks/base/+/282e181b58cf72b6ca770dc7ca5f91f135444502/tools/aapt/AaptAssets.cpp#61
             ignoreAssetsPattern '!.svn:!.git:!.ds_store:!*.scc:.*:!CVS:!thumbs.db:!picasa.ini:!*~'
         }
     }
+    signingConfigs {
+        release {
+            storeFile file("my-release-key.jks")
+            storePassword RELEASE_KEY_PASSWORD
+            keyAlias "my-key-alias"
+            keyPassword RELEASE_KEY_PASSWORD
+        }
+    }
     buildTypes {
         release {
-            minifyEnabled false
+            signingConfig signingConfigs.release
+            minifyEnabled true
             proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'
         }
     }
+    applicationVariants.all { variant ->
+        variant.outputs.all {
+            outputFileName = "ZenKanji-${variant.versionName}.apk"
+        }
+    }
 }
 
 repositories {
@@ -55,8 +67,6 @@ try {
 
 configurations.all {
     resolutionStrategy {
-        // Force the project to use the newer 1.8.22 versions
-        // The 1.8+ versions of jdk7/jdk8 are empty placeholders, fixing the duplication.
         force 'org.jetbrains.kotlin:kotlin-stdlib:1.8.22'
         force 'org.jetbrains.kotlin:kotlin-stdlib-jdk7:1.8.22'
         force 'org.jetbrains.kotlin:kotlin-stdlib-jdk8:1.8.22'